23691489 has 8 divisors (see below), whose sum is σ = 33446880. Its totient is φ = 14865216.

The previous prime is 23691443. The next prime is 23691491. The reversal of 23691489 is 98419632.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23691489 - 2¹⁷ = 23560417 is a prime.

It is a super-2 number, since 2×23691489² = 1122573302074242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 23691489.

It is not an unprimeable number, because it can be changed into a prime (23691419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232219 + ... + 232320.

It is an arithmetic number, because the mean of its divisors is an integer number (4180860).

Almost surely, 2^23691489 is an apocalyptic number.

It is an amenable number.

23691489 is a deficient number, since it is larger than the sum of its proper divisors (9755391).

23691489 is a wasteful number, since it uses less digits than its factorization.

23691489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464559.

The product of its digits is 93312, while the sum is 42.

The square root of 23691489 is about 4867.3903685651. The cubic root of 23691489 is about 287.2086081029.

The spelling of 23691489 in words is "twenty-three million, six hundred ninety-one thousand, four hundred eighty-nine".