1312359631 has 4 divisors (see below), whose sum is σ = 1431665064. Its totient is φ = 1193054200.

The previous prime is 1312359593. The next prime is 1312359641. The reversal of 1312359631 is 1369532131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1312359631 - 2¹¹ = 1312357583 is a prime.

It is a super-2 number, since 2×1312359631² = 3444575602156912322, 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 (1312359641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59652700 + ... + 59652721.

It is an arithmetic number, because the mean of its divisors is an integer number (357916266).

Almost surely, 2^1312359631 is an apocalyptic number.

1312359631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1312359631 is a deficient number, since it is larger than the sum of its proper divisors (119305433).

1312359631 is a wasteful number, since it uses less digits than its factorization.

1312359631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119305432.

The product of its digits is 14580, while the sum is 34.

The square root of 1312359631 is about 36226.5045374240. The cubic root of 1312359631 is about 1094.8407519155.

The spelling of 1312359631 in words is "one billion, three hundred twelve million, three hundred fifty-nine thousand, six hundred thirty-one".