722143993 has 6 divisors (see below), whose sum is σ = 747905054. Its totient is φ = 697241664.

The previous prime is 722143991. The next prime is 722143999. The reversal of 722143993 is 399341227.

722143993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 219128809 + 503015184 = 14803^2 + 22428^2 .

It is not a de Polignac number, because 722143993 - 2¹ = 722143991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722143991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 428496 + ... + 430177.

Almost surely, 2^722143993 is an apocalyptic number.

It is an amenable number.

722143993 is a deficient number, since it is larger than the sum of its proper divisors (25761061).

722143993 is an equidigital number, since it uses as much as digits as its factorization.

722143993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858731 (or 858702 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 722143993 is about 26872.7369837908. The cubic root of 722143993 is about 897.1697066498.

The spelling of 722143993 in words is "seven hundred twenty-two million, one hundred forty-three thousand, nine hundred ninety-three".