93900221 has 4 divisors (see below), whose sum is σ = 93923232. Its totient is φ = 93877212.

The previous prime is 93900217. The next prime is 93900229. The reversal of 93900221 is 12200939.

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 a cyclic number.

It is not a de Polignac number, because 93900221 - 2² = 93900217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93900229) 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, 3551 + ... + 14156.

It is an arithmetic number, because the mean of its divisors is an integer number (23480808).

Almost surely, 2^93900221 is an apocalyptic number.

It is an amenable number.

93900221 is a deficient number, since it is larger than the sum of its proper divisors (23011).

93900221 is a wasteful number, since it uses less digits than its factorization.

93900221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23010.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 93900221 is about 9690.2126395658. The cubic root of 93900221 is about 454.5226584337.

The spelling of 93900221 in words is "ninety-three million, nine hundred thousand, two hundred twenty-one".