23819897 has 4 divisors (see below), whose sum is σ = 24463716. Its totient is φ = 23176080.

The previous prime is 23819869. The next prime is 23819909. The reversal of 23819897 is 79891832.

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 20647936 + 3171961 = 4544^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 23819897 - 2⁶ = 23819833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23819857) 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, 321854 + ... + 321927.

It is an arithmetic number, because the mean of its divisors is an integer number (6115929).

Almost surely, 2^23819897 is an apocalyptic number.

It is an amenable number.

23819897 is a deficient number, since it is larger than the sum of its proper divisors (643819).

23819897 is an equidigital number, since it uses as much as digits as its factorization.

23819897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643818.

The product of its digits is 217728, while the sum is 47.

The square root of 23819897 is about 4880.5631847155. The cubic root of 23819897 is about 287.7265641945.

The spelling of 23819897 in words is "twenty-three million, eight hundred nineteen thousand, eight hundred ninety-seven".