816757873 has 2 divisors, whose sum is σ = 816757874. Its totient is φ = 816757872.

The previous prime is 816757861. The next prime is 816757897. The reversal of 816757873 is 378757618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647549809 + 169208064 = 25447^2 + 13008^2 .

It is a cyclic number.

It is not a de Polignac number, because 816757873 - 2²⁹ = 279886961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 816757873.

It is not a weakly prime, because it can be changed into another prime (816757813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408378936 + 408378937.

It is an arithmetic number, because the mean of its divisors is an integer number (408378937).

Almost surely, 2^816757873 is an apocalyptic number.

It is an amenable number.

816757873 is a deficient number, since it is larger than the sum of its proper divisors (1).

816757873 is an equidigital number, since it uses as much as digits as its factorization.

816757873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1975680, while the sum is 52.

The square root of 816757873 is about 28578.9760663324. The cubic root of 816757873 is about 934.7549561361.

The spelling of 816757873 in words is "eight hundred sixteen million, seven hundred fifty-seven thousand, eight hundred seventy-three".