811612013 has 8 divisors (see below), whose sum is σ = 819815040. Its totient is φ = 803420640.

The previous prime is 811612003. The next prime is 811612033. The reversal of 811612013 is 310216118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811612013 is a prime.

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 811612013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811612003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221708 + ... + 225338.

It is an arithmetic number, because the mean of its divisors is an integer number (102476880).

Almost surely, 2^811612013 is an apocalyptic number.

It is an amenable number.

811612013 is a deficient number, since it is larger than the sum of its proper divisors (8203027).

811612013 is a wasteful number, since it uses less digits than its factorization.

811612013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5827.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 811612013 is about 28488.8050468952. The cubic root of 811612013 is about 932.7877246331.

The spelling of 811612013 in words is "eight hundred eleven million, six hundred twelve thousand, thirteen".