84972531 has 8 divisors (see below), whose sum is σ = 129481984. Its totient is φ = 48555720.

The previous prime is 84972509. The next prime is 84972533. The reversal of 84972531 is 13527948.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84972531 - 2⁶ = 84972467 is a prime.

It is a super-2 number, since 2×84972531² = 14440662049091922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84972531.

It is not an unprimeable number, because it can be changed into a prime (84972533) 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 7 ways as a sum of consecutive naturals, for example, 2023135 + ... + 2023176.

It is an arithmetic number, because the mean of its divisors is an integer number (16185248).

Almost surely, 2^84972531 is an apocalyptic number.

84972531 is a deficient number, since it is larger than the sum of its proper divisors (44509453).

84972531 is a wasteful number, since it uses less digits than its factorization.

84972531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4046321.

The product of its digits is 60480, while the sum is 39.

The square root of 84972531 is about 9218.0546212311. The cubic root of 84972531 is about 439.6355987739.

The spelling of 84972531 in words is "eighty-four million, nine hundred seventy-two thousand, five hundred thirty-one".