722173957 has 8 divisors (see below), whose sum is σ = 764890776. Its totient is φ = 679483392.

The previous prime is 722173951. The next prime is 722173961. The reversal of 722173957 is 759371227.

It can be written as a sum of positive squares in 4 ways, for example, as 467164996 + 255008961 = 21614^2 + 15969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 722173957 - 2²³ = 713785349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722173951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95943 + ... + 103195.

It is an arithmetic number, because the mean of its divisors is an integer number (95611347).

Almost surely, 2^722173957 is an apocalyptic number.

It is an amenable number.

722173957 is a deficient number, since it is larger than the sum of its proper divisors (42716819).

722173957 is a wasteful number, since it uses less digits than its factorization.

722173957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13127.

The product of its digits is 185220, while the sum is 43.

The square root of 722173957 is about 26873.2944947210. The cubic root of 722173957 is about 897.1821152652.

The spelling of 722173957 in words is "seven hundred twenty-two million, one hundred seventy-three thousand, nine hundred fifty-seven".