717621473 has 4 divisors (see below), whose sum is σ = 721769748. Its totient is φ = 713473200.

The previous prime is 717621467. The next prime is 717621491. The reversal of 717621473 is 374126717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 374126717 = 23 ⋅16266379.

It can be written as a sum of positive squares in 2 ways, for example, as 635392849 + 82228624 = 25207^2 + 9068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-717621473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (717621433) 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, 2073878 + ... + 2074223.

It is an arithmetic number, because the mean of its divisors is an integer number (180442437).

Almost surely, 2^717621473 is an apocalyptic number.

It is an amenable number.

717621473 is a deficient number, since it is larger than the sum of its proper divisors (4148275).

717621473 is a wasteful number, since it uses less digits than its factorization.

717621473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4148274.

The product of its digits is 49392, while the sum is 38.

The square root of 717621473 is about 26788.4578316856. The cubic root of 717621473 is about 895.2929028944.

The spelling of 717621473 in words is "seven hundred seventeen million, six hundred twenty-one thousand, four hundred seventy-three".