23963909 has 2 divisors, whose sum is σ = 23963910. Its totient is φ = 23963908.

The previous prime is 23963893. The next prime is 23963917. The reversal of 23963909 is 90936932.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23716900 + 247009 = 4870^2 + 497^2 .

It is a cyclic number.

It is not a de Polignac number, because 23963909 - 2⁴ = 23963893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23968909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11981954 + 11981955.

It is an arithmetic number, because the mean of its divisors is an integer number (11981955).

Almost surely, 2^23963909 is an apocalyptic number.

It is an amenable number.

23963909 is a deficient number, since it is larger than the sum of its proper divisors (1).

23963909 is an equidigital number, since it uses as much as digits as its factorization.

23963909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 41.

The square root of 23963909 is about 4895.2945774488. The cubic root of 23963909 is about 288.3052519977.

The spelling of 23963909 in words is "twenty-three million, nine hundred sixty-three thousand, nine hundred nine".