3607323721 has 9 divisors (see below), whose sum is σ = 3833086261. Its totient is φ = 3394167232.

The previous prime is 3607323677. The next prime is 3607323739. The reversal of 3607323721 is 1273237063.

The square root of 3607323721 is 60061.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1286011321 + 2321312400 = 35861^2 + 48180^2 .

It is not a de Polignac number, because 3607323721 - 2²⁵ = 3573769289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3607323781) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1019271 + ... + 1022803.

Almost surely, 2^3607323721 is an apocalyptic number.

3607323721 is the 60061-st square number.

3607323721 is the 30031-st centered octagonal number.

It is an amenable number.

3607323721 is a deficient number, since it is larger than the sum of its proper divisors (225762540).

3607323721 is an frugal number, since it uses more digits than its factorization.

3607323721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100 (or 3550 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 34.

The cubic root of 3607323721 is about 1533.6574638603.

The spelling of 3607323721 in words is "three billion, six hundred seven million, three hundred twenty-three thousand, seven hundred twenty-one".