722714278921 has 4 divisors (see below), whose sum is σ = 732893353344. Its totient is φ = 712535204500.

The previous prime is 722714278901. The next prime is 722714278967. The reversal of 722714278921 is 129872417227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 722714278921 - 2⁹ = 722714278409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722714278901) 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, 5089537105 + ... + 5089537246.

It is an arithmetic number, because the mean of its divisors is an integer number (183223338336).

Almost surely, 2^722714278921 is an apocalyptic number.

722714278921 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

722714278921 is a deficient number, since it is larger than the sum of its proper divisors (10179074423).

722714278921 is a wasteful number, since it uses less digits than its factorization.

722714278921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10179074422.

The product of its digits is 1580544, while the sum is 52.

The spelling of 722714278921 in words is "seven hundred twenty-two billion, seven hundred fourteen million, two hundred seventy-eight thousand, nine hundred twenty-one".