82945831 has 4 divisors (see below), whose sum is σ = 82966464. Its totient is φ = 82925200.

The previous prime is 82945817. The next prime is 82945847. The reversal of 82945831 is 13854928.

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 82945831 - 2¹⁹ = 82421543 is a prime.

It is a super-2 number, since 2×82945831² = 13760021760561122, 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 (82945931) 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, 2110 + ... + 13051.

It is an arithmetic number, because the mean of its divisors is an integer number (20741616).

Almost surely, 2^82945831 is an apocalyptic number.

82945831 is a deficient number, since it is larger than the sum of its proper divisors (20633).

82945831 is a wasteful number, since it uses less digits than its factorization.

82945831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20632.

The product of its digits is 69120, while the sum is 40.

The square root of 82945831 is about 9107.4601838273. The cubic root of 82945831 is about 436.1121513107.

The spelling of 82945831 in words is "eighty-two million, nine hundred forty-five thousand, eight hundred thirty-one".