721942793 has 16 divisors (see below), whose sum is σ = 848916096. Its totient is φ = 605283840.

The previous prime is 721942789. The next prime is 721942807. The reversal of 721942793 is 397249127.

721942793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 721942793 - 2² = 721942789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721942763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287180 + ... + 289682.

It is an arithmetic number, because the mean of its divisors is an integer number (53057256).

Almost surely, 2^721942793 is an apocalyptic number.

It is an amenable number.

721942793 is a deficient number, since it is larger than the sum of its proper divisors (126973303).

721942793 is a wasteful number, since it uses less digits than its factorization.

721942793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544.

The product of its digits is 190512, while the sum is 44.

The square root of 721942793 is about 26868.9931519586. The cubic root of 721942793 is about 897.0863773260.

The spelling of 721942793 in words is "seven hundred twenty-one million, nine hundred forty-two thousand, seven hundred ninety-three".