93804721 has 4 divisors (see below), whose sum is σ = 93827700. Its totient is φ = 93781744.

The previous prime is 93804713. The next prime is 93804751. The reversal of 93804721 is 12740839.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12740839 = 37 ⋅344347.

It can be written as a sum of positive squares in 2 ways, for example, as 6195121 + 87609600 = 2489^2 + 9360^2 .

It is a cyclic number.

It is not a de Polignac number, because 93804721 - 2³ = 93804713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93804751) 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, 3526 + ... + 14143.

It is an arithmetic number, because the mean of its divisors is an integer number (23456925).

Almost surely, 2^93804721 is an apocalyptic number.

It is an amenable number.

93804721 is a deficient number, since it is larger than the sum of its proper divisors (22979).

93804721 is a wasteful number, since it uses less digits than its factorization.

93804721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22978.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 93804721 is about 9685.2837335826. The cubic root of 93804721 is about 454.3685173777.

The spelling of 93804721 in words is "ninety-three million, eight hundred four thousand, seven hundred twenty-one".