722537 has 2 divisors, whose sum is σ = 722538. Its totient is φ = 722536.

The previous prime is 722521. The next prime is 722539. The reversal of 722537 is 735227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 712336 + 10201 = 844^2 + 101^2 .

It is a cyclic number.

It is not a de Polignac number, because 722537 - 2⁴ = 722521 is a prime.

Together with 722539, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722537.

It is not a weakly prime, because it can be changed into another prime (722539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361268 + 361269.

It is an arithmetic number, because the mean of its divisors is an integer number (361269).

2⁷²²⁵³⁷ is an apocalyptic number.

It is an amenable number.

722537 is a deficient number, since it is larger than the sum of its proper divisors (1).

722537 is an equidigital number, since it uses as much as digits as its factorization.

722537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 26.

The square root of 722537 is about 850.0217644272. The cubic root of 722537 is about 89.7332430444.

The spelling of 722537 in words is "seven hundred twenty-two thousand, five hundred thirty-seven".