82974813 has 4 divisors (see below), whose sum is σ = 110633088. Its totient is φ = 55316540.

The previous prime is 82974811. The next prime is 82974847. The reversal of 82974813 is 31847928.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82974813 - 2¹ = 82974811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82974811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13829133 + ... + 13829138.

It is an arithmetic number, because the mean of its divisors is an integer number (27658272).

Almost surely, 2^82974813 is an apocalyptic number.

It is an amenable number.

82974813 is a deficient number, since it is larger than the sum of its proper divisors (27658275).

82974813 is a wasteful number, since it uses less digits than its factorization.

82974813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27658274.

The product of its digits is 96768, while the sum is 42.

The square root of 82974813 is about 9109.0511580515. The cubic root of 82974813 is about 436.1629391980.

The spelling of 82974813 in words is "eighty-two million, nine hundred seventy-four thousand, eight hundred thirteen".