140971631 has 2 divisors, whose sum is σ = 140971632. Its totient is φ = 140971630.

The previous prime is 140971613. The next prime is 140971643. The reversal of 140971631 is 136179041.

Together with previous prime (140971613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140971631 is a prime.

It is a super-2 number, since 2×140971631² = 39746001493600322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140971661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70485815 + 70485816.

It is an arithmetic number, because the mean of its divisors is an integer number (70485816).

Almost surely, 2^140971631 is an apocalyptic number.

140971631 is a deficient number, since it is larger than the sum of its proper divisors (1).

140971631 is an equidigital number, since it uses as much as digits as its factorization.

140971631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 140971631 is about 11873.1474765540. The cubic root of 140971631 is about 520.4478771986.

The spelling of 140971631 in words is "one hundred forty million, nine hundred seventy-one thousand, six hundred thirty-one".