722972657 has 8 divisors (see below), whose sum is σ = 790284000. Its totient is φ = 655925760.

The previous prime is 722972647. The next prime is 722972729. The reversal of 722972657 is 756279227.

It is a happy number.

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 722972657 - 2⁴ = 722972641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722972647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60368 + ... + 71345.

It is an arithmetic number, because the mean of its divisors is an integer number (98785500).

Almost surely, 2^722972657 is an apocalyptic number.

It is an amenable number.

722972657 is a deficient number, since it is larger than the sum of its proper divisors (67311343).

722972657 is a wasteful number, since it uses less digits than its factorization.

722972657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132223.

The product of its digits is 740880, while the sum is 47.

The square root of 722972657 is about 26888.1508661343. The cubic root of 722972657 is about 897.5127444439.

It can be divided in two parts, 722 and 972657, that added together give a palindrome (973379).

The spelling of 722972657 in words is "seven hundred twenty-two million, nine hundred seventy-two thousand, six hundred fifty-seven".