816920907 has 16 divisors (see below), whose sum is σ = 1258146432. Its totient is φ = 465979520.

The previous prime is 816920887. The next prime is 816920911. The reversal of 816920907 is 709029618.

It is not a de Polignac number, because 816920907 - 2⁶ = 816920843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816920977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727533 + ... + 728654.

It is an arithmetic number, because the mean of its divisors is an integer number (78634152).

Almost surely, 2^816920907 is an apocalyptic number.

816920907 is a deficient number, since it is larger than the sum of its proper divisors (441225525).

816920907 is a wasteful number, since it uses less digits than its factorization.

816920907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456218.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 816920907 is about 28581.8282655256. The cubic root of 816920907 is about 934.8171478438.

The spelling of 816920907 in words is "eight hundred sixteen million, nine hundred twenty thousand, nine hundred seven".