722691 has 12 divisors (see below), whose sum is σ = 1062360. Its totient is φ = 473280.

The previous prime is 722669. The next prime is 722713. The reversal of 722691 is 196227.

It is an interprime number because it is at equal distance from previous prime (722669) and next prime (722713).

It is not a de Polignac number, because 722691 - 2⁷ = 722563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (88530).

2⁷²²⁶⁹¹ is an apocalyptic number.

722691 is a deficient number, since it is larger than the sum of its proper divisors (339669).

722691 is a wasteful number, since it uses less digits than its factorization.

722691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426 (or 1423 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 722691 is about 850.1123455168. The cubic root of 722691 is about 89.7396177757.

The spelling of 722691 in words is "seven hundred twenty-two thousand, six hundred ninety-one".