812523867 has 32 divisors (see below), whose sum is σ = 1124782848. Its totient is φ = 521479296.

The previous prime is 812523851. The next prime is 812523871. The reversal of 812523867 is 768325218.

It is not a de Polignac number, because 812523867 - 2⁴ = 812523851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (812523167) 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, 2772973 + ... + 2773265.

It is an arithmetic number, because the mean of its divisors is an integer number (35149464).

Almost surely, 2^812523867 is an apocalyptic number.

812523867 is a deficient number, since it is larger than the sum of its proper divisors (312258981).

812523867 is a wasteful number, since it uses less digits than its factorization.

812523867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619.

The product of its digits is 161280, while the sum is 42.

The square root of 812523867 is about 28504.8042792790. The cubic root of 812523867 is about 933.1369259193.

The spelling of 812523867 in words is "eight hundred twelve million, five hundred twenty-three thousand, eight hundred sixty-seven".