604347721 has 2 divisors, whose sum is σ = 604347722. Its totient is φ = 604347720.

The previous prime is 604347713. The next prime is 604347767. The reversal of 604347721 is 127743406.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443692096 + 160655625 = 21064^2 + 12675^2 .

It is a cyclic number.

It is not a de Polignac number, because 604347721 - 2³ = 604347713 is a prime.

It is not a weakly prime, because it can be changed into another prime (604347781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302173860 + 302173861.

It is an arithmetic number, because the mean of its divisors is an integer number (302173861).

Almost surely, 2^604347721 is an apocalyptic number.

It is an amenable number.

604347721 is a deficient number, since it is larger than the sum of its proper divisors (1).

604347721 is an equidigital number, since it uses as much as digits as its factorization.

604347721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 604347721 is about 24583.4847204378. The cubic root of 604347721 is about 845.4649920231.

The spelling of 604347721 in words is "six hundred four million, three hundred forty-seven thousand, seven hundred twenty-one".