1316399431 has 16 divisors (see below), whose sum is σ = 1378062400. Its totient is φ = 1256352768.

The previous prime is 1316399419. The next prime is 1316399479. The reversal of 1316399431 is 1349936131.

It is a cyclic number.

It is not a de Polignac number, because 1316399431 - 2¹⁵ = 1316366663 is a prime.

It is a super-2 number, since 2×1316399431² = 3465814923874247522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316391431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413815 + ... + 416983.

It is an arithmetic number, because the mean of its divisors is an integer number (86128900).

Almost surely, 2^1316399431 is an apocalyptic number.

1316399431 is a deficient number, since it is larger than the sum of its proper divisors (61662969).

1316399431 is a wasteful number, since it uses less digits than its factorization.

1316399431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418.

The product of its digits is 52488, while the sum is 40.

The square root of 1316399431 is about 36282.2192127218. The cubic root of 1316399431 is about 1095.9630070696.

The spelling of 1316399431 in words is "one billion, three hundred sixteen million, three hundred ninety-nine thousand, four hundred thirty-one".