722957 has 4 divisors (see below), whose sum is σ = 730080. Its totient is φ = 715836.

The previous prime is 722933. The next prime is 722963. The reversal of 722957 is 759227.

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, and also an emirpimes, since its reverse is a distinct semiprime: 759227 = 7 ⋅108461.

It is a cyclic number.

It is not a de Polignac number, because 722957 - 2¹⁸ = 460813 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3407 + ... + 3612.

It is an arithmetic number, because the mean of its divisors is an integer number (182520).

2⁷²²⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

722957 is a deficient number, since it is larger than the sum of its proper divisors (7123).

722957 is a wasteful number, since it uses less digits than its factorization.

722957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122.

The product of its digits is 8820, while the sum is 32.

The square root of 722957 is about 850.2687810334. The cubic root of 722957 is about 89.7506265426.

The spelling of 722957 in words is "seven hundred twenty-two thousand, nine hundred fifty-seven".