717138263 has 2 divisors, whose sum is σ = 717138264. Its totient is φ = 717138262.

The previous prime is 717138241. The next prime is 717138271. The reversal of 717138263 is 362831717.

It is a strong prime.

It is an emirp because it is prime and its reverse (362831717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 717138263 - 2⁶ = 717138199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (717138293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358569131 + 358569132.

It is an arithmetic number, because the mean of its divisors is an integer number (358569132).

Almost surely, 2^717138263 is an apocalyptic number.

717138263 is a deficient number, since it is larger than the sum of its proper divisors (1).

717138263 is an equidigital number, since it uses as much as digits as its factorization.

717138263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 717138263 is about 26779.4373167175. The cubic root of 717138263 is about 895.0919094569.

The spelling of 717138263 in words is "seven hundred seventeen million, one hundred thirty-eight thousand, two hundred sixty-three".