93788221 has 4 divisors (see below), whose sum is σ = 93931200. Its totient is φ = 93645244.

The previous prime is 93788213. The next prime is 93788243. The reversal of 93788221 is 12288739.

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 93788221 - 2³ = 93788213 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93788281) 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, 70501 + ... + 71818.

It is an arithmetic number, because the mean of its divisors is an integer number (23482800).

Almost surely, 2^93788221 is an apocalyptic number.

It is an amenable number.

93788221 is a deficient number, since it is larger than the sum of its proper divisors (142979).

93788221 is a wasteful number, since it uses less digits than its factorization.

93788221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142978.

The product of its digits is 48384, while the sum is 40.

The square root of 93788221 is about 9684.4318883453. The cubic root of 93788221 is about 454.3418750791.

The spelling of 93788221 in words is "ninety-three million, seven hundred eighty-eight thousand, two hundred twenty-one".