816375293 has 2 divisors, whose sum is σ = 816375294. Its totient is φ = 816375292.

The previous prime is 816375283. The next prime is 816375347. The reversal of 816375293 is 392573618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 596238724 + 220136569 = 24418^2 + 14837^2 .

It is a cyclic number.

It is not a de Polignac number, because 816375293 - 2⁴ = 816375277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816375233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408187646 + 408187647.

It is an arithmetic number, because the mean of its divisors is an integer number (408187647).

Almost surely, 2^816375293 is an apocalyptic number.

It is an amenable number.

816375293 is a deficient number, since it is larger than the sum of its proper divisors (1).

816375293 is an equidigital number, since it uses as much as digits as its factorization.

816375293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 816375293 is about 28572.2819004713. The cubic root of 816375293 is about 934.6089828862.

The spelling of 816375293 in words is "eight hundred sixteen million, three hundred seventy-five thousand, two hundred ninety-three".