23209867 has 2 divisors, whose sum is σ = 23209868. Its totient is φ = 23209866.

The previous prime is 23209847. The next prime is 23209873. The reversal of 23209867 is 76890232.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23209867 is a prime.

It is not a weakly prime, because it can be changed into another prime (23209817) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11604933 + 11604934.

It is an arithmetic number, because the mean of its divisors is an integer number (11604934).

Almost surely, 2^23209867 is an apocalyptic number.

23209867 is a deficient number, since it is larger than the sum of its proper divisors (1).

23209867 is an equidigital number, since it uses as much as digits as its factorization.

23209867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 23209867 is about 4817.6619848221. The cubic root of 23209867 is about 285.2490569383.

The spelling of 23209867 in words is "twenty-three million, two hundred nine thousand, eight hundred sixty-seven".