93876721 has 3 divisors (see below), whose sum is σ = 93886411. Its totient is φ = 93867032.

The previous prime is 93876709. The next prime is 93876763. The reversal of 93876721 is 12767839.

It is a happy number.

The square root of 93876721 is 9689.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 52403121 + 41473600 = 7239^2 + 6440^2 .

It is not a de Polignac number, because 93876721 - 2⁵ = 93876689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93876781) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4845 + ... + 14533.

Almost surely, 2^93876721 is an apocalyptic number.

93876721 is the 9689-th square number.

93876721 is the 4845-th centered octagonal number.

It is an amenable number.

93876721 is a deficient number, since it is larger than the sum of its proper divisors (9690).

93876721 is an frugal number, since it uses more digits than its factorization.

93876721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19378 (or 9689 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The cubic root of 93876721 is about 454.4847381337.

The spelling of 93876721 in words is "ninety-three million, eight hundred seventy-six thousand, seven hundred twenty-one".