23495809 has 4 divisors (see below), whose sum is σ = 23715504. Its totient is φ = 23276116.

The previous prime is 23495807. The next prime is 23495821. The reversal of 23495809 is 90859432.

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 23495809 - 2¹ = 23495807 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23495803) 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, 109687 + ... + 109900.

It is an arithmetic number, because the mean of its divisors is an integer number (5928876).

Almost surely, 2^23495809 is an apocalyptic number.

It is an amenable number.

23495809 is a deficient number, since it is larger than the sum of its proper divisors (219695).

23495809 is a wasteful number, since it uses less digits than its factorization.

23495809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219694.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 23495809 is about 4847.2475694976. The cubic root of 23495809 is about 286.4156872760.

The spelling of 23495809 in words is "twenty-three million, four hundred ninety-five thousand, eight hundred nine".