816626423 has 2 divisors, whose sum is σ = 816626424. Its totient is φ = 816626422.

The previous prime is 816626417. The next prime is 816626471. The reversal of 816626423 is 324626618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816626423 - 2⁴ = 816626407 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816626123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408313211 + 408313212.

It is an arithmetic number, because the mean of its divisors is an integer number (408313212).

Almost surely, 2^816626423 is an apocalyptic number.

816626423 is a deficient number, since it is larger than the sum of its proper divisors (1).

816626423 is an equidigital number, since it uses as much as digits as its factorization.

816626423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The square root of 816626423 is about 28576.6762063050. The cubic root of 816626423 is about 934.7048065812.

The spelling of 816626423 in words is "eight hundred sixteen million, six hundred twenty-six thousand, four hundred twenty-three".