23487409 has 4 divisors (see below), whose sum is σ = 25622640. Its totient is φ = 21352180.

The previous prime is 23487403. The next prime is 23487413. The reversal of 23487409 is 90478432.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23487409 - 2⁵ = 23487377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23487403) 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 3 ways as a sum of consecutive naturals, for example, 1067599 + ... + 1067620.

It is an arithmetic number, because the mean of its divisors is an integer number (6405660).

Almost surely, 2^23487409 is an apocalyptic number.

It is an amenable number.

23487409 is a deficient number, since it is larger than the sum of its proper divisors (2135231).

23487409 is a wasteful number, since it uses less digits than its factorization.

23487409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135230.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 23487409 is about 4846.3810209269. The cubic root of 23487409 is about 286.3815509960.

The spelling of 23487409 in words is "twenty-three million, four hundred eighty-seven thousand, four hundred nine".