140608931 has 2 divisors, whose sum is σ = 140608932. Its totient is φ = 140608930.

The previous prime is 140608927. The next prime is 140608943. The reversal of 140608931 is 139806041.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (139806041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140608931 - 2² = 140608927 is a prime.

It is a super-2 number, since 2×140608931² = 39541742953925522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140608031) 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 as a sum of consecutive naturals, namely, 70304465 + 70304466.

It is an arithmetic number, because the mean of its divisors is an integer number (70304466).

Almost surely, 2^140608931 is an apocalyptic number.

140608931 is a deficient number, since it is larger than the sum of its proper divisors (1).

140608931 is an equidigital number, since it uses as much as digits as its factorization.

140608931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 140608931 is about 11857.8636777457. The cubic root of 140608931 is about 520.0011476799.

The spelling of 140608931 in words is "one hundred forty million, six hundred eight thousand, nine hundred thirty-one".