813695013 has 6 divisors (see below), whose sum is σ = 1175337254. Its totient is φ = 542463336.

The previous prime is 813694951. The next prime is 813695039. The reversal of 813695013 is 310596318.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 786634209 + 27060804 = 28047^2 + 5202^2 .

It is not a de Polignac number, because 813695013 - 2¹³ = 813686821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813695053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45205270 + ... + 45205287.

Almost surely, 2^813695013 is an apocalyptic number.

It is an amenable number.

813695013 is a deficient number, since it is larger than the sum of its proper divisors (361642241).

813695013 is a wasteful number, since it uses less digits than its factorization.

813695013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90410563 (or 90410560 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 813695013 is about 28525.3398402193. The cubic root of 813695013 is about 933.5850419609.

The spelling of 813695013 in words is "eight hundred thirteen million, six hundred ninety-five thousand, thirteen".