722715157 has 2 divisors, whose sum is σ = 722715158. Its totient is φ = 722715156.

The previous prime is 722715139. The next prime is 722715163. The reversal of 722715157 is 751517227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552908196 + 169806961 = 23514^2 + 13031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722715157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722715127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361357578 + 361357579.

It is an arithmetic number, because the mean of its divisors is an integer number (361357579).

Almost surely, 2^722715157 is an apocalyptic number.

It is an amenable number.

722715157 is a deficient number, since it is larger than the sum of its proper divisors (1).

722715157 is an equidigital number, since it uses as much as digits as its factorization.

722715157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34300, while the sum is 37.

The square root of 722715157 is about 26883.3620851262. The cubic root of 722715157 is about 897.4061765708.

The spelling of 722715157 in words is "seven hundred twenty-two million, seven hundred fifteen thousand, one hundred fifty-seven".