1312011319 has 4 divisors (see below), whose sum is σ = 1312158240. Its totient is φ = 1311864400.

The previous prime is 1312011317. The next prime is 1312011341. The reversal of 1312011319 is 9131102131.

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 1312011319 - 2¹ = 1312011317 is a prime.

It is a super-2 number, since 2×1312011319² = 3442747402368239522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312011319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312011317) 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 3 ways as a sum of consecutive naturals, for example, 59134 + ... + 78235.

It is an arithmetic number, because the mean of its divisors is an integer number (328039560).

Almost surely, 2^1312011319 is an apocalyptic number.

1312011319 is a deficient number, since it is larger than the sum of its proper divisors (146921).

1312011319 is an equidigital number, since it uses as much as digits as its factorization.

1312011319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146920.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1312011319 is about 36221.6967990181. The cubic root of 1312011319 is about 1094.7438831647.

The spelling of 1312011319 in words is "one billion, three hundred twelve million, eleven thousand, three hundred nineteen".