82473021 has 12 divisors (see below), whose sum is σ = 119254720. Its totient is φ = 54923400.

The previous prime is 82472987. The next prime is 82473031. The reversal of 82473021 is 12037428.

It is not a de Polignac number, because 82473021 - 2¹⁷ = 82341949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82473031) 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, 5100 + ... + 13818.

Almost surely, 2^82473021 is an apocalyptic number.

It is an amenable number.

82473021 is a deficient number, since it is larger than the sum of its proper divisors (36781699).

82473021 is a wasteful number, since it uses less digits than its factorization.

82473021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9776 (or 9773 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 82473021 is about 9081.4657957843. The cubic root of 82473021 is about 435.2819258437.

The spelling of 82473021 in words is "eighty-two million, four hundred seventy-three thousand, twenty-one".