812499995 has 4 divisors (see below), whose sum is σ = 975000000. Its totient is φ = 649999992.

The previous prime is 812499977. The next prime is 812499997. The reversal of 812499995 is 599994218.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 812499995 - 2²² = 808305691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812499995.

It is not an unprimeable number, because it can be changed into a prime (812499997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81249995 + ... + 81250004.

It is an arithmetic number, because the mean of its divisors is an integer number (243750000).

Almost surely, 2^812499995 is an apocalyptic number.

812499995 is a deficient number, since it is larger than the sum of its proper divisors (162500005).

812499995 is a wasteful number, since it uses less digits than its factorization.

812499995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162500004.

The product of its digits is 2099520, while the sum is 56.

The square root of 812499995 is about 28504.3855397726. The cubic root of 812499995 is about 933.1277872902.

The spelling of 812499995 in words is "eight hundred twelve million, four hundred ninety-nine thousand, nine hundred ninety-five".