816880739 has 2 divisors, whose sum is σ = 816880740. Its totient is φ = 816880738.

The previous prime is 816880663. The next prime is 816880759. The reversal of 816880739 is 937088618.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 816880739 - 2²⁴ = 800103523 is a prime.

It is a super-2 number, since 2×816880739² = 1334588283498372242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (816880759) 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, 408440369 + 408440370.

It is an arithmetic number, because the mean of its divisors is an integer number (408440370).

Almost surely, 2^816880739 is an apocalyptic number.

816880739 is a deficient number, since it is larger than the sum of its proper divisors (1).

816880739 is an equidigital number, since it uses as much as digits as its factorization.

816880739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 816880739 is about 28581.1255726572. The cubic root of 816880739 is about 934.8018259400.

The spelling of 816880739 in words is "eight hundred sixteen million, eight hundred eighty thousand, seven hundred thirty-nine".