813236 has 6 divisors (see below), whose sum is σ = 1423170. Its totient is φ = 406616.

The previous prime is 813227. The next prime is 813251. The reversal of 813236 is 632318.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 309136 = 710^2 + 556^2 .

It is a super-2 number, since 2×813236² = 1322705583392, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 813236.

It is an unprimeable number.

813236 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101651 + ... + 101658.

It is an arithmetic number, because the mean of its divisors is an integer number (237195).

2⁸¹³²³⁶ is an apocalyptic number.

It is an amenable number.

813236 is a deficient number, since it is larger than the sum of its proper divisors (609934).

813236 is a wasteful number, since it uses less digits than its factorization.

813236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203313 (or 203311 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 813236 is about 901.7959857972. The cubic root of 813236 is about 93.3409460911.

The spelling of 813236 in words is "eight hundred thirteen thousand, two hundred thirty-six".