23669491 has 4 divisors (see below), whose sum is σ = 25061832. Its totient is φ = 22277152.

The previous prime is 23669489. The next prime is 23669509. The reversal of 23669491 is 19496632.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23669491 - 2¹ = 23669489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23663491) 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, 696145 + ... + 696178.

It is an arithmetic number, because the mean of its divisors is an integer number (6265458).

Almost surely, 2^23669491 is an apocalyptic number.

23669491 is a deficient number, since it is larger than the sum of its proper divisors (1392341).

23669491 is a wasteful number, since it uses less digits than its factorization.

23669491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392340.

The product of its digits is 69984, while the sum is 40.

The square root of 23669491 is about 4865.1301113125. The cubic root of 23669491 is about 287.1196876832.

The spelling of 23669491 in words is "twenty-three million, six hundred sixty-nine thousand, four hundred ninety-one".