43023491 has 4 divisors (see below), whose sum is σ = 49169712. Its totient is φ = 36877272.

The previous prime is 43023457. The next prime is 43023493. The reversal of 43023491 is 19432034.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19432034 = 2 ⋅9716017.

It is a cyclic number.

It is not a de Polignac number, because 43023491 - 2⁶ = 43023427 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 43023491.

It is not an unprimeable number, because it can be changed into a prime (43023493) 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, 3073100 + ... + 3073113.

It is an arithmetic number, because the mean of its divisors is an integer number (12292428).

Almost surely, 2^43023491 is an apocalyptic number.

43023491 is a deficient number, since it is larger than the sum of its proper divisors (6146221).

43023491 is an equidigital number, since it uses as much as digits as its factorization.

43023491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6146220.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 43023491 is about 6559.2294516963. The cubic root of 43023491 is about 350.4035915749.

The spelling of 43023491 in words is "forty-three million, twenty-three thousand, four hundred ninety-one".