23970817 has 4 divisors (see below), whose sum is σ = 25814740. Its totient is φ = 22126896.

The previous prime is 23970721. The next prime is 23970827. The reversal of 23970817 is 71807932.

It is a Cunningham number, because it is equal to 4896²+1.

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 3549456 + 20421361 = 1884^2 + 4519^2 .

It is a cyclic number.

It is not a de Polignac number, because 23970817 - 2¹⁵ = 23938049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23970827) 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, 921942 + ... + 921967.

It is an arithmetic number, because the mean of its divisors is an integer number (6453685).

Almost surely, 2^23970817 is an apocalyptic number.

It is an amenable number.

23970817 is a deficient number, since it is larger than the sum of its proper divisors (1843923).

23970817 is a wasteful number, since it uses less digits than its factorization.

23970817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843922.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 23970817 is about 4896.0001021242. Note that the first 3 decimals coincide. The cubic root of 23970817 is about 288.3329522829.

The spelling of 23970817 in words is "twenty-three million, nine hundred seventy thousand, eight hundred seventeen".