82500791 has 4 divisors (see below), whose sum is σ = 82519584. Its totient is φ = 82482000.

The previous prime is 82500763. The next prime is 82500797. The reversal of 82500791 is 19700528.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82500791 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 (82500797) 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 3 ways as a sum of consecutive naturals, for example, 1091 + ... + 12891.

It is an arithmetic number, because the mean of its divisors is an integer number (20629896).

Almost surely, 2^82500791 is an apocalyptic number.

82500791 is a deficient number, since it is larger than the sum of its proper divisors (18793).

82500791 is a wasteful number, since it uses less digits than its factorization.

82500791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18792.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 82500791 is about 9082.9946053050. The cubic root of 82500791 is about 435.3307758494.

The spelling of 82500791 in words is "eighty-two million, five hundred thousand, seven hundred ninety-one".