7204896721 has 24 divisors (see below), whose sum is σ = 8073922472. Its totient is φ = 6422803200.

The previous prime is 7204896697. The next prime is 7204896731. The reversal of 7204896721 is 1276984027.

It can be written as a sum of positive squares in 4 ways, for example, as 1235171025 + 5969725696 = 35145^2 + 77264^2 .

It is not a de Polignac number, because 7204896721 - 2⁷ = 7204896593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7204896731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2751805 + ... + 2754421.

Almost surely, 2^7204896721 is an apocalyptic number.

It is an amenable number.

7204896721 is a deficient number, since it is larger than the sum of its proper divisors (869025751).

7204896721 is a wasteful number, since it uses less digits than its factorization.

7204896721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073 (or 3062 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 7204896721 is about 84881.6630433217. The cubic root of 7204896721 is about 1931.4164229865.

The spelling of 7204896721 in words is "seven billion, two hundred four million, eight hundred ninety-six thousand, seven hundred twenty-one".