83124921 has 16 divisors (see below), whose sum is σ = 126167040. Its totient is φ = 48187920.

The previous prime is 83124893. The next prime is 83124931. The reversal of 83124921 is 12942138.

It is not a de Polignac number, because 83124921 - 2⁹ = 83124409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83124931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54001 + ... + 55518.

It is an arithmetic number, because the mean of its divisors is an integer number (7885440).

Almost surely, 2^83124921 is an apocalyptic number.

It is an amenable number.

83124921 is a deficient number, since it is larger than the sum of its proper divisors (43042119).

83124921 is a wasteful number, since it uses less digits than its factorization.

83124921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109556.

The product of its digits is 3456, while the sum is 30.

The square root of 83124921 is about 9117.2869319771. The cubic root of 83124921 is about 436.4257985030.

It can be divided in two parts, 831 and 24921, that added together give a palindrome (25752).

The spelling of 83124921 in words is "eighty-three million, one hundred twenty-four thousand, nine hundred twenty-one".