43021489 has 4 divisors (see below), whose sum is σ = 49167424. Its totient is φ = 36875556.

The previous prime is 43021469. The next prime is 43021493. The reversal of 43021489 is 98412034.

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.

It is a cyclic number.

It is not a de Polignac number, because 43021489 - 2⁷ = 43021361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43021489.

It is not an unprimeable number, because it can be changed into a prime (43021469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3072957 + ... + 3072970.

It is an arithmetic number, because the mean of its divisors is an integer number (12291856).

Almost surely, 2^43021489 is an apocalyptic number.

It is an amenable number.

43021489 is a deficient number, since it is larger than the sum of its proper divisors (6145935).

43021489 is an equidigital number, since it uses as much as digits as its factorization.

43021489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6145934.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 43021489 is about 6559.0768405318. The cubic root of 43021489 is about 350.3981564134.

The spelling of 43021489 in words is "forty-three million, twenty-one thousand, four hundred eighty-nine".