1957137431 has 2 divisors, whose sum is σ = 1957137432. Its totient is φ = 1957137430.

The previous prime is 1957137407. The next prime is 1957137443. The reversal of 1957137431 is 1347317591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1957137431 is a prime.

It is a super-2 number, since 2×1957137431² = 7660773847642559522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1957137451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978568715 + 978568716.

It is an arithmetic number, because the mean of its divisors is an integer number (978568716).

Almost surely, 2^1957137431 is an apocalyptic number.

1957137431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957137431 is an equidigital number, since it uses as much as digits as its factorization.

1957137431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 41.

The square root of 1957137431 is about 44239.5460080684. The cubic root of 1957137431 is about 1250.8553997794.

The spelling of 1957137431 in words is "one billion, nine hundred fifty-seven million, one hundred thirty-seven thousand, four hundred thirty-one".