12137831 has 2 divisors, whose sum is σ = 12137832. Its totient is φ = 12137830.

The previous prime is 12137821. The next prime is 12137843. The reversal of 12137831 is 13873121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12137831 is a prime.

It is a super-2 number, since 2×12137831² = 294653882769122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12137831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12137821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6068915 + 6068916.

It is an arithmetic number, because the mean of its divisors is an integer number (6068916).

Almost surely, 2^12137831 is an apocalyptic number.

12137831 is a deficient number, since it is larger than the sum of its proper divisors (1).

12137831 is an equidigital number, since it uses as much as digits as its factorization.

12137831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 12137831 is about 3483.9390063547. The cubic root of 12137831 is about 229.8160533026.

The spelling of 12137831 in words is "twelve million, one hundred thirty-seven thousand, eight hundred thirty-one".