904801721 has 8 divisors (see below), whose sum is σ = 912936960. Its totient is φ = 896682528.

The previous prime is 904801649. The next prime is 904801739. The reversal of 904801721 is 127108409.

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 904801721 - 2¹⁴ = 904785337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (904801771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128525 + ... + 135381.

It is an arithmetic number, because the mean of its divisors is an integer number (114117120).

Almost surely, 2^904801721 is an apocalyptic number.

It is an amenable number.

904801721 is a deficient number, since it is larger than the sum of its proper divisors (8135239).

904801721 is a wasteful number, since it uses less digits than its factorization.

904801721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8023.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 904801721 is about 30079.9222239686. The cubic root of 904801721 is about 967.2033809955.

The spelling of 904801721 in words is "nine hundred four million, eight hundred one thousand, seven hundred twenty-one".