813136 has 10 divisors (see below), whose sum is σ = 1575482. Its totient is φ = 406560.

The previous prime is 813133. The next prime is 813157. The reversal of 813136 is 631318.

It can be written as a sum of positive squares in only one way, i.e., 810000 + 3136 = 900^2 + 56^2 .

It is a super-2 number, since 2×813136² = 1322380308992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25395 + ... + 25426.

2⁸¹³¹³⁶ is an apocalyptic number.

It is an amenable number.

813136 is a deficient number, since it is larger than the sum of its proper divisors (762346).

813136 is a wasteful number, since it uses less digits than its factorization.

813136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50829 (or 50823 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 813136 is about 901.7405391796. The cubic root of 813136 is about 93.3371200278.

It can be divided in two parts, 813 and 136, that added together give a palindrome (949).

The spelling of 813136 in words is "eight hundred thirteen thousand, one hundred thirty-six".