8493721 has 8 divisors (see below), whose sum is σ = 8805888. Its totient is φ = 8184000.

The previous prime is 8493713. The next prime is 8493731. The reversal of 8493721 is 1273948.

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

It is not a de Polignac number, because 8493721 - 2³ = 8493713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8493731) 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, 9201 + ... + 10081.

It is an arithmetic number, because the mean of its divisors is an integer number (1100736).

Almost surely, 2^8493721 is an apocalyptic number.

It is an amenable number.

8493721 is a deficient number, since it is larger than the sum of its proper divisors (312167).

8493721 is a wasteful number, since it uses less digits than its factorization.

8493721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223.

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

The square root of 8493721 is about 2914.3989088661. The cubic root of 8493721 is about 204.0324903397.

The spelling of 8493721 in words is "eight million, four hundred ninety-three thousand, seven hundred twenty-one".