140409832369 has 3 divisors (see below), whose sum is σ = 140410207083. Its totient is φ = 140409457656.

The previous prime is 140409832357. The next prime is 140409832373. The reversal of 140409832369 is 963238904041.

The square root of 140409832369 is 374713.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 140156640625 + 253191744 = 374375^2 + 15912^2 .

It is not a de Polignac number, because 140409832369 - 2²¹ = 140407735217 is a prime.

It is a super-2 number, since 2×140409832369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140409832349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 187357 + ... + 562069.

It is an arithmetic number, because the mean of its divisors is an integer number (46803402361).

Almost surely, 2^140409832369 is an apocalyptic number.

140409832369 is the 374713-rd square number.

140409832369 is the 187357-th centered octagonal number.

It is an amenable number.

140409832369 is a deficient number, since it is larger than the sum of its proper divisors (374714).

140409832369 is an frugal number, since it uses more digits than its factorization.

140409832369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749426 (or 374713 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

Multiplying 140409832369 by its sum of digits (49), we get a square (6880081786081 = 2622991²).

The spelling of 140409832369 in words is "one hundred forty billion, four hundred nine million, eight hundred thirty-two thousand, three hundred sixty-nine".