718974689 has 4 divisors (see below), whose sum is σ = 720476160. Its totient is φ = 717473220.

The previous prime is 718974673. The next prime is 718974701. The reversal of 718974689 is 986479817.

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: 986479817 = 83 ⋅11885299.

It is a cyclic number.

It is not a de Polignac number, because 718974689 - 2⁴ = 718974673 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 (718974629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750017 + ... + 750974.

It is an arithmetic number, because the mean of its divisors is an integer number (180119040).

Almost surely, 2^718974689 is an apocalyptic number.

It is an amenable number.

718974689 is a deficient number, since it is larger than the sum of its proper divisors (1501471).

718974689 is a wasteful number, since it uses less digits than its factorization.

718974689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501470.

The product of its digits is 6096384, while the sum is 59.

The square root of 718974689 is about 26813.7033809207. The cubic root of 718974689 is about 895.8552996457.

The spelling of 718974689 in words is "seven hundred eighteen million, nine hundred seventy-four thousand, six hundred eighty-nine".