83958721 has 8 divisors (see below), whose sum is σ = 104675904. Its totient is φ = 65422320.

The previous prime is 83958713. The next prime is 83958737. The reversal of 83958721 is 12785938.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83958721 - 2³ = 83958713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83958761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545110 + ... + 545263.

It is an arithmetic number, because the mean of its divisors is an integer number (13084488).

Almost surely, 2^83958721 is an apocalyptic number.

It is an amenable number.

83958721 is a deficient number, since it is larger than the sum of its proper divisors (20717183).

83958721 is a wasteful number, since it uses less digits than its factorization.

83958721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090391.

The product of its digits is 120960, while the sum is 43.

The square root of 83958721 is about 9162.8991591090. The cubic root of 83958721 is about 437.8801632778.

The spelling of 83958721 in words is "eighty-three million, nine hundred fifty-eight thousand, seven hundred twenty-one".