812964561 has 8 divisors (see below), whose sum is σ = 1085595264. Its totient is φ = 541155120.

The previous prime is 812964547. The next prime is 812964587. The reversal of 812964561 is 165469218.

812964561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 812964561 - 2⁷ = 812964433 is a prime.

It is a super-2 number, since 2×812964561² = 1321822754883845442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812964161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203001 + ... + 206966.

It is an arithmetic number, because the mean of its divisors is an integer number (135699408).

Almost surely, 2^812964561 is an apocalyptic number.

It is an amenable number.

812964561 is a deficient number, since it is larger than the sum of its proper divisors (272630703).

812964561 is a wasteful number, since it uses less digits than its factorization.

812964561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410631.

The product of its digits is 103680, while the sum is 42.

The square root of 812964561 is about 28512.5334019971. The cubic root of 812964561 is about 933.3055993318.

The spelling of 812964561 in words is "eight hundred twelve million, nine hundred sixty-four thousand, five hundred sixty-one".