816922807 has 2 divisors, whose sum is σ = 816922808. Its totient is φ = 816922806.

The previous prime is 816922703. The next prime is 816922829. The reversal of 816922807 is 708229618.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816922807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816922207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408461403 + 408461404.

It is an arithmetic number, because the mean of its divisors is an integer number (408461404).

Almost surely, 2^816922807 is an apocalyptic number.

816922807 is a deficient number, since it is larger than the sum of its proper divisors (1).

816922807 is an equidigital number, since it uses as much as digits as its factorization.

816922807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 816922807 is about 28581.8615034081. The cubic root of 816922807 is about 934.8178725778.

It can be divided in two parts, 8169 and 22807, that added together give a square (30976 = 176²).

The spelling of 816922807 in words is "eight hundred sixteen million, nine hundred twenty-two thousand, eight hundred seven".