1317472831 has 2 divisors, whose sum is σ = 1317472832. Its totient is φ = 1317472830.

The previous prime is 1317472789. The next prime is 1317472837. The reversal of 1317472831 is 1382747131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1317472831 - 2⁹ = 1317472319 is a prime.

It is a super-2 number, since 2×1317472831² = 3471469320846309122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317472837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658736415 + 658736416.

It is an arithmetic number, because the mean of its divisors is an integer number (658736416).

Almost surely, 2^1317472831 is an apocalyptic number.

1317472831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317472831 is an equidigital number, since it uses as much as digits as its factorization.

1317472831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 1317472831 is about 36297.0085682002. The cubic root of 1317472831 is about 1096.2608110794.

The spelling of 1317472831 in words is "one billion, three hundred seventeen million, four hundred seventy-two thousand, eight hundred thirty-one".