1311892951 has 4 divisors (see below), whose sum is σ = 1311971752. Its totient is φ = 1311814152.

The previous prime is 1311892931. The next prime is 1311893003. The reversal of 1311892951 is 1592981131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1311892951 - 2¹¹ = 1311890903 is a prime.

It is a super-2 number, since 2×1311892951² = 3442126229766976802, 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 (1311892921) 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, 3561 + ... + 51346.

It is an arithmetic number, because the mean of its divisors is an integer number (327992938).

Almost surely, 2^1311892951 is an apocalyptic number.

1311892951 is a deficient number, since it is larger than the sum of its proper divisors (78801).

1311892951 is an equidigital number, since it uses as much as digits as its factorization.

1311892951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78800.

The product of its digits is 19440, while the sum is 40.

The square root of 1311892951 is about 36220.0628243519. The cubic root of 1311892951 is about 1094.7109600389.

The spelling of 1311892951 in words is "one billion, three hundred eleven million, eight hundred ninety-two thousand, nine hundred fifty-one".