904721397 has 8 divisors (see below), whose sum is σ = 1207093344. Its totient is φ = 602748528.

The previous prime is 904721371. The next prime is 904721407. The reversal of 904721397 is 793127409.

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

It is not a de Polignac number, because 904721397 - 2⁷ = 904721269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904721327) 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, 94438 + ... + 103575.

It is an arithmetic number, because the mean of its divisors is an integer number (150886668).

Almost surely, 2^904721397 is an apocalyptic number.

It is an amenable number.

904721397 is a deficient number, since it is larger than the sum of its proper divisors (302371947).

904721397 is a wasteful number, since it uses less digits than its factorization.

904721397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199539.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 904721397 is about 30078.5870180100. The cubic root of 904721397 is about 967.1747589075.

The spelling of 904721397 in words is "nine hundred four million, seven hundred twenty-one thousand, three hundred ninety-seven".