83939215 has 16 divisors (see below), whose sum is σ = 102055968. Its totient is φ = 66272256.

The previous prime is 83939209. The next prime is 83939221. The reversal of 83939215 is 51293938.

It is an interprime number because it is at equal distance from previous prime (83939209) and next prime (83939221).

It is a cyclic number.

It is not a de Polignac number, because 83939215 - 2²⁵ = 50384783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 193639 + ... + 194071.

It is an arithmetic number, because the mean of its divisors is an integer number (6378498).

Almost surely, 2^83939215 is an apocalyptic number.

83939215 is a deficient number, since it is larger than the sum of its proper divisors (18116753).

83939215 is a wasteful number, since it uses less digits than its factorization.

83939215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its digits is 58320, while the sum is 40.

The square root of 83939215 is about 9161.8346961730. The cubic root of 83939215 is about 437.8462499772.

The spelling of 83939215 in words is "eighty-three million, nine hundred thirty-nine thousand, two hundred fifteen".