1316597381 has 32 divisors (see below), whose sum is σ = 1571011200. Its totient is φ = 1090298880.

The previous prime is 1316597363. The next prime is 1316597389. The reversal of 1316597381 is 1837956131.

It is not a de Polignac number, because 1316597381 - 2¹⁰ = 1316596357 is a prime.

It is a super-2 number, since 2×1316597381² = 3466857327312118322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316597389) 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 31 ways as a sum of consecutive naturals, for example, 687281 + ... + 689193.

It is an arithmetic number, because the mean of its divisors is an integer number (49094100).

Almost surely, 2^1316597381 is an apocalyptic number.

1316597381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1316597381 is a deficient number, since it is larger than the sum of its proper divisors (254413819).

1316597381 is a wasteful number, since it uses less digits than its factorization.

1316597381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069.

The product of its digits is 136080, while the sum is 44.

The square root of 1316597381 is about 36284.9470304147. The cubic root of 1316597381 is about 1096.0179384729.

The spelling of 1316597381 in words is "one billion, three hundred sixteen million, five hundred ninety-seven thousand, three hundred eighty-one".