140520899 has 4 divisors (see below), whose sum is σ = 143948280. Its totient is φ = 137093520.

The previous prime is 140520889. The next prime is 140520911. The reversal of 140520899 is 998025041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140520899 - 2⁴ = 140520883 is a prime.

It is a super-2 number, since 2×140520899² = 39492246111536402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140520889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1713629 + ... + 1713710.

It is an arithmetic number, because the mean of its divisors is an integer number (35987070).

Almost surely, 2^140520899 is an apocalyptic number.

140520899 is a deficient number, since it is larger than the sum of its proper divisors (3427381).

140520899 is an equidigital number, since it uses as much as digits as its factorization.

140520899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427380.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 140520899 is about 11854.1511294567. The cubic root of 140520899 is about 519.8926047937.

The spelling of 140520899 in words is "one hundred forty million, five hundred twenty thousand, eight hundred ninety-nine".