717665089 has 4 divisors (see below), whose sum is σ = 727773120. Its totient is φ = 707557060.

The previous prime is 717665087. The next prime is 717665101. The reversal of 717665089 is 980566717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 980566717 = 13 ⋅75428209.

It is a cyclic number.

It is not a de Polignac number, because 717665089 - 2¹ = 717665087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (717665087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5053909 + ... + 5054050.

It is an arithmetic number, because the mean of its divisors is an integer number (181943280).

Almost surely, 2^717665089 is an apocalyptic number.

It is an amenable number.

717665089 is a deficient number, since it is larger than the sum of its proper divisors (10108031).

717665089 is a wasteful number, since it uses less digits than its factorization.

717665089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10108030.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 717665089 is about 26789.2719012667. The cubic root of 717665089 is about 895.3110407316.

The spelling of 717665089 in words is "seven hundred seventeen million, six hundred sixty-five thousand, eighty-nine".