43867489 has 4 divisors (see below), whose sum is σ = 43881156. Its totient is φ = 43853824.

The previous prime is 43867487. The next prime is 43867493. The reversal of 43867489 is 98476834.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 37149025 + 6718464 = 6095^2 + 2592^2 .

It is a cyclic number.

It is not a de Polignac number, because 43867489 - 2¹ = 43867487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43867487) 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, 897 + ... + 9409.

It is an arithmetic number, because the mean of its divisors is an integer number (10970289).

Almost surely, 2^43867489 is an apocalyptic number.

It is an amenable number.

43867489 is a deficient number, since it is larger than the sum of its proper divisors (13667).

43867489 is an equidigital number, since it uses as much as digits as its factorization.

43867489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13666.

The product of its digits is 1161216, while the sum is 49.

The square root of 43867489 is about 6623.2536566253. The cubic root of 43867489 is about 352.6800756564.

The spelling of 43867489 in words is "forty-three million, eight hundred sixty-seven thousand, four hundred eighty-nine".