813159 has 10 divisors (see below), whose sum is σ = 1214840. Its totient is φ = 542052.

The previous prime is 813157. The next prime is 813167. The reversal of 813159 is 951318.

813159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 813159 - 2¹ = 813157 is a prime.

It is a super-2 number, since 2×813159² = 1322455118562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813157) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4939 + ... + 5100.

It is an arithmetic number, because the mean of its divisors is an integer number (121484).

2⁸¹³¹⁵⁹ is an apocalyptic number.

813159 is a deficient number, since it is larger than the sum of its proper divisors (401681).

813159 is a wasteful number, since it uses less digits than its factorization.

813159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051 (or 10042 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 813159 is about 901.7532922036. The cubic root of 813159 is about 93.3380000501.

It can be divided in two parts, 81 and 3159, that added together give a triangular number (3240 = T₈₀).

The spelling of 813159 in words is "eight hundred thirteen thousand, one hundred fifty-nine".