1391313311 has 4 divisors (see below), whose sum is σ = 1425247824. Its totient is φ = 1357378800.

The previous prime is 1391313241. The next prime is 1391313347. The reversal of 1391313311 is 1133131931.

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

It is not a de Polignac number, because 1391313311 - 2³⁰ = 317571487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391313211) 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, 16967195 + ... + 16967276.

It is an arithmetic number, because the mean of its divisors is an integer number (356311956).

Almost surely, 2^1391313311 is an apocalyptic number.

1391313311 is a deficient number, since it is larger than the sum of its proper divisors (33934513).

1391313311 is an equidigital number, since it uses as much as digits as its factorization.

1391313311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33934512.

The product of its digits is 729, while the sum is 26.

The square root of 1391313311 is about 37300.3124785839. The cubic root of 1391313311 is about 1116.3704013130.

The spelling of 1391313311 in words is "one billion, three hundred ninety-one million, three hundred thirteen thousand, three hundred eleven".