3603598721 has 4 divisors (see below), whose sum is σ = 3605058372. Its totient is φ = 3602139072.

The previous prime is 3603598709. The next prime is 3603598763. The reversal of 3603598721 is 1278953063.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1278953063 = 37 ⋅34566299.

It can be written as a sum of positive squares in 2 ways, for example, as 1651284496 + 1952314225 = 40636^2 + 44185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3603598721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3603598321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726116 + ... + 731061.

It is an arithmetic number, because the mean of its divisors is an integer number (901264593).

Almost surely, 2^3603598721 is an apocalyptic number.

It is an amenable number.

3603598721 is a deficient number, since it is larger than the sum of its proper divisors (1459651).

3603598721 is a wasteful number, since it uses less digits than its factorization.

3603598721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459650.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 3603598721 is about 60029.9818507386. The cubic root of 3603598721 is about 1533.1293861647.

The spelling of 3603598721 in words is "three billion, six hundred three million, five hundred ninety-eight thousand, seven hundred twenty-one".