82474857 has 6 divisors (see below), whose sum is σ = 119130362. Its totient is φ = 54983232.

The previous prime is 82474853. The next prime is 82474879. The reversal of 82474857 is 75847428.

It can be written as a sum of positive squares in only one way, i.e., 65999376 + 16475481 = 8124^2 + 4059^2 .

It is not a de Polignac number, because 82474857 - 2² = 82474853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82474853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4581928 + ... + 4581945.

Almost surely, 2^82474857 is an apocalyptic number.

It is an amenable number.

82474857 is a deficient number, since it is larger than the sum of its proper divisors (36655505).

82474857 is a wasteful number, since it uses less digits than its factorization.

82474857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9163879 (or 9163876 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 82474857 is about 9081.5668802250. The cubic root of 82474857 is about 435.2851558765.

The spelling of 82474857 in words is "eighty-two million, four hundred seventy-four thousand, eight hundred fifty-seven".