23856869 has 2 divisors, whose sum is σ = 23856870. Its totient is φ = 23856868.

The previous prime is 23856863. The next prime is 23856881. The reversal of 23856869 is 96865832.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20811844 + 3045025 = 4562^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 23856869 - 2⁴ = 23856853 is a prime.

It is a super-2 number, since 2×23856869² = 1138300396966322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23856863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11928434 + 11928435.

It is an arithmetic number, because the mean of its divisors is an integer number (11928435).

Almost surely, 2^23856869 is an apocalyptic number.

It is an amenable number.

23856869 is a deficient number, since it is larger than the sum of its proper divisors (1).

23856869 is an equidigital number, since it uses as much as digits as its factorization.

23856869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 47.

The square root of 23856869 is about 4884.3493937269. The cubic root of 23856869 is about 287.8753519557.

The spelling of 23856869 in words is "twenty-three million, eight hundred fifty-six thousand, eight hundred sixty-nine".