717225137 has 2 divisors, whose sum is σ = 717225138. Its totient is φ = 717225136.

The previous prime is 717225049. The next prime is 717225143. The reversal of 717225137 is 731522717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 644702881 + 72522256 = 25391^2 + 8516^2 .

It is a cyclic number.

It is not a de Polignac number, because 717225137 - 2¹⁴ = 717208753 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 717225097 and 717225106.

It is not a weakly prime, because it can be changed into another prime (717225037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358612568 + 358612569.

It is an arithmetic number, because the mean of its divisors is an integer number (358612569).

Almost surely, 2^717225137 is an apocalyptic number.

It is an amenable number.

717225137 is a deficient number, since it is larger than the sum of its proper divisors (1).

717225137 is an equidigital number, since it uses as much as digits as its factorization.

717225137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20580, while the sum is 35.

The square root of 717225137 is about 26781.0592957037. The cubic root of 717225137 is about 895.1280517551.

The spelling of 717225137 in words is "seven hundred seventeen million, two hundred twenty-five thousand, one hundred thirty-seven".