140097431 has 4 divisors (see below), whose sum is σ = 147471000. Its totient is φ = 132723864.

The previous prime is 140097427. The next prime is 140097437. The reversal of 140097431 is 134790041.

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 140097431 - 2² = 140097427 is a prime.

It is a super-2 number, since 2×140097431² = 39254580345599522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140097394 and 140097403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140097437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3686756 + ... + 3686793.

It is an arithmetic number, because the mean of its divisors is an integer number (36867750).

Almost surely, 2^140097431 is an apocalyptic number.

140097431 is a deficient number, since it is larger than the sum of its proper divisors (7373569).

140097431 is an equidigital number, since it uses as much as digits as its factorization.

140097431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373568.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 140097431 is about 11836.2760613294. The cubic root of 140097431 is about 519.3698369894.

The spelling of 140097431 in words is "one hundred forty million, ninety-seven thousand, four hundred thirty-one".