717768949 has 2 divisors, whose sum is σ = 717768950. Its totient is φ = 717768948.

The previous prime is 717768929. The next prime is 717768967. The reversal of 717768949 is 949867717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504316849 + 213452100 = 22457^2 + 14610^2 .

It is a cyclic number.

It is not a de Polignac number, because 717768949 - 2⁹ = 717768437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 717768893 and 717768902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (717768929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358884474 + 358884475.

It is an arithmetic number, because the mean of its divisors is an integer number (358884475).

Almost surely, 2^717768949 is an apocalyptic number.

It is an amenable number.

717768949 is a deficient number, since it is larger than the sum of its proper divisors (1).

717768949 is an equidigital number, since it uses as much as digits as its factorization.

717768949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 58.

The square root of 717768949 is about 26791.2102936765. The cubic root of 717768949 is about 895.3542282484.

The spelling of 717768949 in words is "seven hundred seventeen million, seven hundred sixty-eight thousand, nine hundred forty-nine".