9040375721 has 8 divisors (see below), whose sum is σ = 9736743744. Its totient is φ = 8344144080.

The previous prime is 9040375709. The next prime is 9040375733. The reversal of 9040375721 is 1275730409.

It is an interprime number because it is at equal distance from previous prime (9040375709) and next prime (9040375733).

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

It is a cyclic number.

It is not a de Polignac number, because 9040375721 - 2¹⁰ = 9040374697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9040375781) 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, 134486 + ... + 190176.

It is an arithmetic number, because the mean of its divisors is an integer number (1217092968).

Almost surely, 2^9040375721 is an apocalyptic number.

It is an amenable number.

9040375721 is a deficient number, since it is larger than the sum of its proper divisors (696368023).

9040375721 is a wasteful number, since it uses less digits than its factorization.

9040375721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68191.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 9040375721 is about 95080.8904091669. The cubic root of 9040375721 is about 2083.1897343640.

The spelling of 9040375721 in words is "nine billion, forty million, three hundred seventy-five thousand, seven hundred twenty-one".