82790831 has 4 divisors (see below), whose sum is σ = 82824000. Its totient is φ = 82757664.

The previous prime is 82790789. The next prime is 82790837. The reversal of 82790831 is 13809728.

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

It is a cyclic number.

It is not a de Polignac number, because 82790831 - 2¹⁰ = 82789807 is a prime.

It is a super-2 number, since 2×82790831² = 13708643395341122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82790837) 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, 12506 + ... + 17943.

It is an arithmetic number, because the mean of its divisors is an integer number (20706000).

Almost surely, 2^82790831 is an apocalyptic number.

82790831 is a deficient number, since it is larger than the sum of its proper divisors (33169).

82790831 is a wasteful number, since it uses less digits than its factorization.

82790831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33168.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 82790831 is about 9098.9466972832. The cubic root of 82790831 is about 435.8403291967.

The spelling of 82790831 in words is "eighty-two million, seven hundred ninety thousand, eight hundred thirty-one".