83934921 has 16 divisors (see below), whose sum is σ = 129340800. Its totient is φ = 47422848.

The previous prime is 83934911. The next prime is 83934923. The reversal of 83934921 is 12943938.

It is not a de Polignac number, because 83934921 - 2⁷ = 83934793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83934921.

It is not an unprimeable number, because it can be changed into a prime (83934923) 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, 20586 + ... + 24323.

It is an arithmetic number, because the mean of its divisors is an integer number (8083800).

Almost surely, 2^83934921 is an apocalyptic number.

It is an amenable number.

83934921 is a deficient number, since it is larger than the sum of its proper divisors (45405879).

83934921 is a wasteful number, since it uses less digits than its factorization.

83934921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45008.

The product of its digits is 46656, while the sum is 39.

The square root of 83934921 is about 9161.6003514670. The cubic root of 83934921 is about 437.8387836861.

The spelling of 83934921 in words is "eighty-three million, nine hundred thirty-four thousand, nine hundred twenty-one".