82918791 has 6 divisors (see below), whose sum is σ = 119771600. Its totient is φ = 55279188.

The previous prime is 82918747. The next prime is 82918817. The reversal of 82918791 is 19781928.

It is a de Polignac number, because none of the positive numbers 2^k-82918791 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 (82918721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4606591 + ... + 4606608.

Almost surely, 2^82918791 is an apocalyptic number.

82918791 is a deficient number, since it is larger than the sum of its proper divisors (36852809).

82918791 is a wasteful number, since it uses less digits than its factorization.

82918791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9213205 (or 9213202 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 82918791 is about 9105.9755655284. The cubic root of 82918791 is about 436.0647559038.

The spelling of 82918791 in words is "eighty-two million, nine hundred eighteen thousand, seven hundred ninety-one".