813480091 has 2 divisors, whose sum is σ = 813480092. Its totient is φ = 813480090.

The previous prime is 813480071. The next prime is 813480133. The reversal of 813480091 is 190084318.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 813480091 - 2²¹ = 811382939 is a prime.

It is not a weakly prime, because it can be changed into another prime (813480061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406740045 + 406740046.

It is an arithmetic number, because the mean of its divisors is an integer number (406740046).

Almost surely, 2^813480091 is an apocalyptic number.

813480091 is a deficient number, since it is larger than the sum of its proper divisors (1).

813480091 is an equidigital number, since it uses as much as digits as its factorization.

813480091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 813480091 is about 28521.5723795165. The cubic root of 813480091 is about 933.5028385024.

The spelling of 813480091 in words is "eight hundred thirteen million, four hundred eighty thousand, ninety-one".