23297809 has 4 divisors (see below), whose sum is σ = 23468004. Its totient is φ = 23127616.

The previous prime is 23297801. The next prime is 23297831. The reversal of 23297809 is 90879232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4635409 + 18662400 = 2153^2 + 4320^2 .

It is a cyclic number.

It is not a de Polignac number, because 23297809 - 2³ = 23297801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23297801) 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, 84892 + ... + 85165.

It is an arithmetic number, because the mean of its divisors is an integer number (5867001).

Almost surely, 2^23297809 is an apocalyptic number.

It is an amenable number.

23297809 is a deficient number, since it is larger than the sum of its proper divisors (170195).

23297809 is a wasteful number, since it uses less digits than its factorization.

23297809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170194.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 23297809 is about 4826.7803969106. The cubic root of 23297809 is about 285.6088716719.

The spelling of 23297809 in words is "twenty-three million, two hundred ninety-seven thousand, eight hundred nine".