82928991 has 4 divisors (see below), whose sum is σ = 110571992. Its totient is φ = 55285992.

The previous prime is 82928987. The next prime is 82929013. The reversal of 82928991 is 19982928.

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

It is not a de Polignac number, because 82928991 - 2² = 82928987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82928991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82928921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13821496 + ... + 13821501.

It is an arithmetic number, because the mean of its divisors is an integer number (27642998).

Almost surely, 2^82928991 is an apocalyptic number.

82928991 is a deficient number, since it is larger than the sum of its proper divisors (27643001).

82928991 is a wasteful number, since it uses less digits than its factorization.

82928991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27643000.

The product of its digits is 186624, while the sum is 48.

The square root of 82928991 is about 9106.5356200918. The cubic root of 82928991 is about 436.0826355588.

The spelling of 82928991 in words is "eighty-two million, nine hundred twenty-eight thousand, nine hundred ninety-one".