43718489 has 4 divisors (see below), whose sum is σ = 43906356. Its totient is φ = 43530624.

The previous prime is 43718473. The next prime is 43718513. The reversal of 43718489 is 98481734.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30614089 + 13104400 = 5533^2 + 3620^2 .

It is a cyclic number.

It is not a de Polignac number, because 43718489 - 2⁴ = 43718473 is a prime.

It is a super-2 number, since 2×43718489² = 3822612560886242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43711489) 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, 93584 + ... + 94049.

It is an arithmetic number, because the mean of its divisors is an integer number (10976589).

Almost surely, 2^43718489 is an apocalyptic number.

It is an amenable number.

43718489 is a deficient number, since it is larger than the sum of its proper divisors (187867).

43718489 is a wasteful number, since it uses less digits than its factorization.

43718489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187866.

The product of its digits is 193536, while the sum is 44.

The square root of 43718489 is about 6611.9958408940. The cubic root of 43718489 is about 352.2803191684.

The spelling of 43718489 in words is "forty-three million, seven hundred eighteen thousand, four hundred eighty-nine".