83925921 has 4 divisors (see below), whose sum is σ = 111901232. Its totient is φ = 55950612.

The previous prime is 83925917. The next prime is 83925931. The reversal of 83925921 is 12952938.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 83925921 - 2² = 83925917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83925921.

It is not an unprimeable number, because it can be changed into a prime (83925931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13987651 + ... + 13987656.

It is an arithmetic number, because the mean of its divisors is an integer number (27975308).

Almost surely, 2^83925921 is an apocalyptic number.

It is an amenable number.

83925921 is a deficient number, since it is larger than the sum of its proper divisors (27975311).

83925921 is a wasteful number, since it uses less digits than its factorization.

83925921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27975310.

The product of its digits is 38880, while the sum is 39.

The square root of 83925921 is about 9161.1091577385. The cubic root of 83925921 is about 437.8231339030.

The spelling of 83925921 in words is "eighty-three million, nine hundred twenty-five thousand, nine hundred twenty-one".