816679051 has 2 divisors, whose sum is σ = 816679052. Its totient is φ = 816679050.

The previous prime is 816679027. The next prime is 816679079. The reversal of 816679051 is 150976618.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816679051 - 2¹⁵ = 816646283 is a prime.

It is equal to p_41959717 and since 816679051 and 41959717 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 816678989 and 816679007.

It is not a weakly prime, because it can be changed into another prime (816679001) 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, 408339525 + 408339526.

It is an arithmetic number, because the mean of its divisors is an integer number (408339526).

Almost surely, 2^816679051 is an apocalyptic number.

816679051 is a deficient number, since it is larger than the sum of its proper divisors (1).

816679051 is an equidigital number, since it uses as much as digits as its factorization.

816679051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 816679051 is about 28577.5970123452. The cubic root of 816679051 is about 934.7248853616.

The spelling of 816679051 in words is "eight hundred sixteen million, six hundred seventy-nine thousand, fifty-one".