721994675 has 24 divisors (see below), whose sum is σ = 949488336. Its totient is φ = 542730240.

The previous prime is 721994659. The next prime is 721994717. The reversal of 721994675 is 576499127.

It is not a de Polignac number, because 721994675 - 2⁴ = 721994659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384539 + ... + 386411.

It is an arithmetic number, because the mean of its divisors is an integer number (39562014).

Almost surely, 2^721994675 is an apocalyptic number.

721994675 is a deficient number, since it is larger than the sum of its proper divisors (227493661).

721994675 is a wasteful number, since it uses less digits than its factorization.

721994675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807 (or 2802 counting only the distinct ones).

The product of its digits is 952560, while the sum is 50.

The square root of 721994675 is about 26869.9585969164. The cubic root of 721994675 is about 897.1078663419.

The spelling of 721994675 in words is "seven hundred twenty-one million, nine hundred ninety-four thousand, six hundred seventy-five".