812909406869 has 8 divisors (see below), whose sum is σ = 948806116608. Its totient is φ = 681954395760.

The previous prime is 812909406847. The next prime is 812909406871. The reversal of 812909406869 is 968604909218.

It is a happy number.

812909406869 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 a cyclic number.

It is not a de Polignac number, because 812909406869 - 2²⁰ = 812908358293 is a prime.

It is a super-2 number, since 2×812909406869² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812909406469) 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, 1235424302 + ... + 1235424959.

It is an arithmetic number, because the mean of its divisors is an integer number (118600764576).

Almost surely, 2^812909406869 is an apocalyptic number.

It is an amenable number.

812909406869 is a deficient number, since it is larger than the sum of its proper divisors (135896709739).

812909406869 is a wasteful number, since it uses less digits than its factorization.

812909406869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470849315.

The product of its (nonzero) digits is 13436928, while the sum is 62.

The spelling of 812909406869 in words is "eight hundred twelve billion, nine hundred nine million, four hundred six thousand, eight hundred sixty-nine".