916858791 has 8 divisors (see below), whose sum is σ = 1358309360. Its totient is φ = 611239176.

The previous prime is 916858781. The next prime is 916858799. The reversal of 916858791 is 197858619.

It is not a de Polignac number, because 916858791 - 2⁶ = 916858727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916858799) 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 in 7 ways as a sum of consecutive naturals, for example, 16978840 + ... + 16978893.

It is an arithmetic number, because the mean of its divisors is an integer number (169788670).

Almost surely, 2^916858791 is an apocalyptic number.

916858791 is a deficient number, since it is larger than the sum of its proper divisors (441450569).

916858791 is a wasteful number, since it uses less digits than its factorization.

916858791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33957742 (or 33957736 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 54.

The square root of 916858791 is about 30279.6762036849. The cubic root of 916858791 is about 971.4806419949.

The spelling of 916858791 in words is "nine hundred sixteen million, eight hundred fifty-eight thousand, seven hundred ninety-one".