813090 has 16 divisors (see below), whose sum is σ = 1951488. Its totient is φ = 216816.

The previous prime is 813089. The next prime is 813091. The reversal of 813090 is 90318.

It is an interprime number because it is at equal distance from previous prime (813089) and next prime (813091).

It is a super-2 number, since 2×813090² = 1322230696200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (813091) 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 in 7 ways as a sum of consecutive naturals, for example, 13522 + ... + 13581.

It is an arithmetic number, because the mean of its divisors is an integer number (121968).

2⁸¹³⁰⁹⁰ is an apocalyptic number.

813090 is an abundant number, since it is smaller than the sum of its proper divisors (1138398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813090 is a wasteful number, since it uses less digits than its factorization.

813090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27113.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 813090 is about 901.7150325907. The cubic root of 813090 is about 93.3353599333.

The spelling of 813090 in words is "eight hundred thirteen thousand, ninety".