812055999 has 32 divisors (see below), whose sum is σ = 1145145600. Its totient is φ = 511105280.

The previous prime is 812055977. The next prime is 812056001. The reversal of 812055999 is 999550218.

It is a happy number.

It is not a de Polignac number, because 812055999 - 2⁸ = 812055743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812055919) 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, 1442092 + ... + 1442654.

It is an arithmetic number, because the mean of its divisors is an integer number (35785800).

Almost surely, 2^812055999 is an apocalyptic number.

812055999 is a deficient number, since it is larger than the sum of its proper divisors (333089601).

812055999 is a wasteful number, since it uses less digits than its factorization.

812055999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its (nonzero) digits is 291600, while the sum is 48.

The square root of 812055999 is about 28496.5962704320. The cubic root of 812055999 is about 932.9577850350.

The spelling of 812055999 in words is "eight hundred twelve million, fifty-five thousand, nine hundred ninety-nine".