84590971 has 4 divisors (see below), whose sum is σ = 87319744. Its totient is φ = 81862200.

The previous prime is 84590939. The next prime is 84590993. The reversal of 84590971 is 17909548.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84590971 - 2⁵ = 84590939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84590911) 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 3 ways as a sum of consecutive naturals, for example, 1364340 + ... + 1364401.

It is an arithmetic number, because the mean of its divisors is an integer number (21829936).

Almost surely, 2^84590971 is an apocalyptic number.

84590971 is a deficient number, since it is larger than the sum of its proper divisors (2728773).

84590971 is a wasteful number, since it uses less digits than its factorization.

84590971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728772.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 84590971 is about 9197.3349944427. The cubic root of 84590971 is about 438.9765659110.

The spelling of 84590971 in words is "eighty-four million, five hundred ninety thousand, nine hundred seventy-one".