140985931 has 2 divisors, whose sum is σ = 140985932. Its totient is φ = 140985930.

The previous prime is 140985881. The next prime is 140985937. The reversal of 140985931 is 139589041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140985931 is a prime.

It is a super-2 number, since 2×140985931² = 39754065479873522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140985937) 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 as a sum of consecutive naturals, namely, 70492965 + 70492966.

It is an arithmetic number, because the mean of its divisors is an integer number (70492966).

Almost surely, 2^140985931 is an apocalyptic number.

140985931 is a deficient number, since it is larger than the sum of its proper divisors (1).

140985931 is an equidigital number, since it uses as much as digits as its factorization.

140985931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 140985931 is about 11873.7496604906. The cubic root of 140985931 is about 520.4654744815.

The spelling of 140985931 in words is "one hundred forty million, nine hundred eighty-five thousand, nine hundred thirty-one".