812005413 has 32 divisors (see below), whose sum is σ = 1184317440. Its totient is φ = 492972480.

The previous prime is 812005393. The next prime is 812005427. The reversal of 812005413 is 314500218.

It is not a de Polignac number, because 812005413 - 2⁸ = 812005157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812005813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275956 + ... + 278882.

It is an arithmetic number, because the mean of its divisors is an integer number (37009920).

Almost surely, 2^812005413 is an apocalyptic number.

It is an amenable number.

812005413 is a deficient number, since it is larger than the sum of its proper divisors (372312027).

812005413 is a wasteful number, since it uses less digits than its factorization.

812005413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 812005413 is about 28495.7086769219. The cubic root of 812005413 is about 932.9384121582.

The spelling of 812005413 in words is "eight hundred twelve million, five thousand, four hundred thirteen".