9371721 has 8 divisors (see below), whose sum is σ = 12786400. Its totient is φ = 6102432.

The previous prime is 9371707. The next prime is 9371723. The reversal of 9371721 is 1271739.

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

It is not a de Polignac number, because 9371721 - 2⁹ = 9371209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9371723) 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, 36196 + ... + 36453.

It is an arithmetic number, because the mean of its divisors is an integer number (1598300).

Almost surely, 2^9371721 is an apocalyptic number.

It is an amenable number.

9371721 is a deficient number, since it is larger than the sum of its proper divisors (3414679).

9371721 is a wasteful number, since it uses less digits than its factorization.

9371721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72695.

The product of its digits is 2646, while the sum is 30.

The square root of 9371721 is about 3061.3266731925. The cubic root of 9371721 is about 210.8335802080.

The spelling of 9371721 in words is "nine million, three hundred seventy-one thousand, seven hundred twenty-one".