84672531 has 12 divisors (see below), whose sum is σ = 128742120. Its totient is φ = 53477280.

The previous prime is 84672527. The next prime is 84672559. The reversal of 84672531 is 13527648.

It is not a de Polignac number, because 84672531 - 2² = 84672527 is a prime.

It is a super-2 number, since 2×84672531² = 14338875011891922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84672571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247410 + ... + 247751.

It is an arithmetic number, because the mean of its divisors is an integer number (10728510).

Almost surely, 2^84672531 is an apocalyptic number.

84672531 is a deficient number, since it is larger than the sum of its proper divisors (44069589).

84672531 is a wasteful number, since it uses less digits than its factorization.

84672531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495186 (or 495183 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 84672531 is about 9201.7678192834. The cubic root of 84672531 is about 439.1176031389.

The spelling of 84672531 in words is "eighty-four million, six hundred seventy-two thousand, five hundred thirty-one".