718842489 has 16 divisors (see below), whose sum is σ = 979050240. Its totient is φ = 469004240.

The previous prime is 718842473. The next prime is 718842491. The reversal of 718842489 is 984248817.

It is a cyclic number.

It is not a de Polignac number, because 718842489 - 2⁴ = 718842473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (718842689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31234 + ... + 49124.

It is an arithmetic number, because the mean of its divisors is an integer number (61190640).

Almost surely, 2^718842489 is an apocalyptic number.

It is an amenable number.

718842489 is a deficient number, since it is larger than the sum of its proper divisors (260207751).

718842489 is a wasteful number, since it uses less digits than its factorization.

718842489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18180.

The product of its digits is 1032192, while the sum is 51.

The square root of 718842489 is about 26811.2381101657. The cubic root of 718842489 is about 895.8003884266.

The spelling of 718842489 in words is "seven hundred eighteen million, eight hundred forty-two thousand, four hundred eighty-nine".