84157983 has 48 divisors (see below), whose sum is σ = 150631936. Its totient is φ = 44089920.

The previous prime is 84157981. The next prime is 84158003. The reversal of 84157983 is 38975148.

It is not a de Polignac number, because 84157983 - 2¹ = 84157981 is a prime.

It is a super-2 number, since 2×84157983² = 14165132205256578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84157981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 172566 + ... + 173052.

Almost surely, 2^84157983 is an apocalyptic number.

84157983 is a deficient number, since it is larger than the sum of its proper divisors (66473953).

84157983 is a wasteful number, since it uses less digits than its factorization.

84157983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 721 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 84157983 is about 9173.7660205610. The cubic root of 84157983 is about 438.2263013967.

It can be divided in two parts, 8415798 and 3, that added together give a square (8415801 = 2901²).

The spelling of 84157983 in words is "eighty-four million, one hundred fifty-seven thousand, nine hundred eighty-three".