23878909 has 2 divisors, whose sum is σ = 23878910. Its totient is φ = 23878908.

The previous prime is 23878903. The next prime is 23878913. The reversal of 23878909 is 90987832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23522500 + 356409 = 4850^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 23878909 - 2¹⁷ = 23747837 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23878903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11939454 + 11939455.

It is an arithmetic number, because the mean of its divisors is an integer number (11939455).

Almost surely, 2^23878909 is an apocalyptic number.

It is an amenable number.

23878909 is a deficient number, since it is larger than the sum of its proper divisors (1).

23878909 is an equidigital number, since it uses as much as digits as its factorization.

23878909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 23878909 is about 4886.6050587294. The cubic root of 23878909 is about 287.9639752072.

The spelling of 23878909 in words is "twenty-three million, eight hundred seventy-eight thousand, nine hundred nine".