1313775965 has 12 divisors (see below), whose sum is σ = 1583002044. Its totient is φ = 1046715264.

The previous prime is 1313775943. The next prime is 1313775973. The reversal of 1313775965 is 5695773131.

It can be written as a sum of positive squares in 2 ways, for example, as 412455481 + 901320484 = 20309^2 + 30022^2 .

It is not a de Polignac number, because 1313775965 - 2⁶ = 1313775901 is a prime.

It is a Duffinian number.

Its product of digits (595350) is a multiple of the sum of its prime divisors (1225).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1487414 + ... + 1488296.

It is an arithmetic number, because the mean of its divisors is an integer number (131916837).

Almost surely, 2^1313775965 is an apocalyptic number.

It is an amenable number.

1313775965 is a deficient number, since it is larger than the sum of its proper divisors (269226079).

1313775965 is an frugal number, since it uses more digits than its factorization.

1313775965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108 (or 1225 counting only the distinct ones).

The product of its digits is 595350, while the sum is 47.

The square root of 1313775965 is about 36246.0475776325. The cubic root of 1313775965 is about 1095.2344708934.

The spelling of 1313775965 in words is "one billion, three hundred thirteen million, seven hundred seventy-five thousand, nine hundred sixty-five".