23491489 has 16 divisors (see below), whose sum is σ = 27417600. Its totient is φ = 19713600.

The previous prime is 23491477. The next prime is 23491513. The reversal of 23491489 is 98419432.

It is a cyclic number.

It is not a de Polignac number, because 23491489 - 2¹⁹ = 22967201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23491409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105232 + ... + 105454.

It is an arithmetic number, because the mean of its divisors is an integer number (1713600).

Almost surely, 2^23491489 is an apocalyptic number.

It is an amenable number.

23491489 is a deficient number, since it is larger than the sum of its proper divisors (3926111).

23491489 is a wasteful number, since it uses less digits than its factorization.

23491489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480.

The product of its digits is 62208, while the sum is 40.

The square root of 23491489 is about 4846.8019352971. The cubic root of 23491489 is about 286.3981324912.

The spelling of 23491489 in words is "twenty-three million, four hundred ninety-one thousand, four hundred eighty-nine".