1371686431 has 2 divisors, whose sum is σ = 1371686432. Its totient is φ = 1371686430.

The previous prime is 1371686389. The next prime is 1371686441. The reversal of 1371686431 is 1346861731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1371686431 is a prime.

It is a super-2 number, since 2×1371686431² = 3763047329979035522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1371686441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685843215 + 685843216.

It is an arithmetic number, because the mean of its divisors is an integer number (685843216).

Almost surely, 2^1371686431 is an apocalyptic number.

1371686431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371686431 is an equidigital number, since it uses as much as digits as its factorization.

1371686431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 1371686431 is about 37036.2853293901. The cubic root of 1371686431 is about 1111.0960769073.

The spelling of 1371686431 in words is "one billion, three hundred seventy-one million, six hundred eighty-six thousand, four hundred thirty-one".