816787079 has 2 divisors, whose sum is σ = 816787080. Its totient is φ = 816787078.

The previous prime is 816787073. The next prime is 816787121. The reversal of 816787079 is 970787618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816787079 - 2¹² = 816782983 is a prime.

It is a super-2 number, since 2×816787079² = 1334282264842704482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 816787079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816787073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408393539 + 408393540.

It is an arithmetic number, because the mean of its divisors is an integer number (408393540).

Almost surely, 2^816787079 is an apocalyptic number.

816787079 is a deficient number, since it is larger than the sum of its proper divisors (1).

816787079 is an equidigital number, since it uses as much as digits as its factorization.

816787079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 53.

The square root of 816787079 is about 28579.4870317856. The cubic root of 816787079 is about 934.7660978011.

The spelling of 816787079 in words is "eight hundred sixteen million, seven hundred eighty-seven thousand, seventy-nine".