722746237 has 8 divisors (see below), whose sum is σ = 741158712. Its totient is φ = 704371200.

The previous prime is 722746229. The next prime is 722746247. The reversal of 722746237 is 732647227.

It can be written as a sum of positive squares in 4 ways, for example, as 26894596 + 695851641 = 5186^2 + 26379^2 .

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 722746237 - 2³ = 722746229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 722746237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722746247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32037 + ... + 49717.

It is an arithmetic number, because the mean of its divisors is an integer number (92644839).

Almost surely, 2^722746237 is an apocalyptic number.

It is an amenable number.

722746237 is a deficient number, since it is larger than the sum of its proper divisors (18412475).

722746237 is a wasteful number, since it uses less digits than its factorization.

722746237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18719.

The product of its digits is 197568, while the sum is 40.

The square root of 722746237 is about 26883.9401316102. The cubic root of 722746237 is about 897.4190405527.

The spelling of 722746237 in words is "seven hundred twenty-two million, seven hundred forty-six thousand, two hundred thirty-seven".