82484721 has 12 divisors (see below), whose sum is σ = 129976080. Its totient is φ = 49990680.

The previous prime is 82484713. The next prime is 82484723. The reversal of 82484721 is 12748428.

It is not a de Polignac number, because 82484721 - 2³ = 82484713 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (82484723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 416491 + ... + 416688.

It is an arithmetic number, because the mean of its divisors is an integer number (10831340).

Almost surely, 2^82484721 is an apocalyptic number.

It is an amenable number.

82484721 is a deficient number, since it is larger than the sum of its proper divisors (47491359).

82484721 is a wasteful number, since it uses less digits than its factorization.

82484721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833196 (or 833193 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 82484721 is about 9082.1099420784. The cubic root of 82484721 is about 435.3025085655.

The spelling of 82484721 in words is "eighty-two million, four hundred eighty-four thousand, seven hundred twenty-one".