84720975 has 24 divisors (see below), whose sum is σ = 141157632. Its totient is φ = 44834400.

The previous prime is 84720973. The next prime is 84720989. The reversal of 84720975 is 57902748.

It is not a de Polignac number, because 84720975 - 2¹ = 84720973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84720971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5514 + ... + 14136.

It is an arithmetic number, because the mean of its divisors is an integer number (5881568).

Almost surely, 2^84720975 is an apocalyptic number.

84720975 is a deficient number, since it is larger than the sum of its proper divisors (56436657).

84720975 is a wasteful number, since it uses less digits than its factorization.

84720975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8767 (or 8762 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 84720975 is about 9204.3997631567. The cubic root of 84720975 is about 439.2013318180.

The spelling of 84720975 in words is "eighty-four million, seven hundred twenty thousand, nine hundred seventy-five".