23489887 has 4 divisors (see below), whose sum is σ = 23577480. Its totient is φ = 23402296.

The previous prime is 23489863. The next prime is 23489891. The reversal of 23489887 is 78898432.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23489887 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 23489887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23489897) 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, 43393 + ... + 43930.

It is an arithmetic number, because the mean of its divisors is an integer number (5894370).

Almost surely, 2^23489887 is an apocalyptic number.

23489887 is a deficient number, since it is larger than the sum of its proper divisors (87593).

23489887 is an equidigital number, since it uses as much as digits as its factorization.

23489887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87592.

The product of its digits is 774144, while the sum is 49.

The square root of 23489887 is about 4846.6366688664. The cubic root of 23489887 is about 286.3916220449.

The spelling of 23489887 in words is "twenty-three million, four hundred eighty-nine thousand, eight hundred eighty-seven".