140809193 has 6 divisors (see below), whose sum is σ = 163798506. Its totient is φ = 120693552.

The previous prime is 140809183. The next prime is 140809199. The reversal of 140809193 is 391908041.

It can be written as a sum of positive squares in only one way, i.e., 128754409 + 12054784 = 11347^2 + 3472^2 .

It is not a de Polignac number, because 140809193 - 2⁸ = 140808937 is a prime.

It is a super-2 number, since 2×140809193² = 39654457666622498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140809199) 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 5 ways as a sum of consecutive naturals, for example, 1436780 + ... + 1436877.

It is an arithmetic number, because the mean of its divisors is an integer number (27299751).

Almost surely, 2^140809193 is an apocalyptic number.

It is an amenable number.

140809193 is a deficient number, since it is larger than the sum of its proper divisors (22989313).

140809193 is an equidigital number, since it uses as much as digits as its factorization.

140809193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873671 (or 2873664 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 140809193 is about 11866.3049429888. The cubic root of 140809193 is about 520.2479007831.

The spelling of 140809193 in words is "one hundred forty million, eight hundred nine thousand, one hundred ninety-three".