717427634121 has 27 divisors (see below), whose sum is σ = 1139100743053. Its totient is φ = 434787686520.

The previous prime is 717427634111. The next prime is 717427634123. The reversal of 717427634121 is 121436724717.

The square root of 717427634121 is 847011.

It is a perfect power (a square), and thus also a powerful number.

717427634121 is a `hidden beast` number, since 7 + 1 + 7 + 4 + 2 + 7 + 634 + 1 + 2 + 1 = 666.

It is not a de Polignac number, because 717427634121 - 2⁹ = 717427633609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (717427634123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 27938530 + ... + 27964196.

Almost surely, 2^717427634121 is an apocalyptic number.

717427634121 is the 847011-st square number.

717427634121 is the 423506-th centered octagonal number.

It is an amenable number.

717427634121 is a deficient number, since it is larger than the sum of its proper divisors (421673108932).

717427634121 is an frugal number, since it uses more digits than its factorization.

717427634121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51362 (or 25681 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The spelling of 717427634121 in words is "seven hundred seventeen billion, four hundred twenty-seven million, six hundred thirty-four thousand, one hundred twenty-one".