84997539 has 24 divisors (see below), whose sum is σ = 138415760. Its totient is φ = 51511680.

The previous prime is 84997537. The next prime is 84997559. The reversal of 84997539 is 93579948.

It is not a de Polignac number, because 84997539 - 2¹ = 84997537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84997537) 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 23 ways as a sum of consecutive naturals, for example, 9742 + ... + 16275.

Almost surely, 2^84997539 is an apocalyptic number.

84997539 is a deficient number, since it is larger than the sum of its proper divisors (53418221).

84997539 is a wasteful number, since it uses less digits than its factorization.

84997539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26048 (or 26031 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 84997539 is about 9219.4109898626. The cubic root of 84997539 is about 439.6787238032.

The spelling of 84997539 in words is "eighty-four million, nine hundred ninety-seven thousand, five hundred thirty-nine".