23949909 has 12 divisors (see below), whose sum is σ = 34678176. Its totient is φ = 15927912.

The previous prime is 23949907. The next prime is 23949941. The reversal of 23949909 is 90994932.

It is not a de Polignac number, because 23949909 - 2¹ = 23949907 is a prime.

It is a super-2 number, since 2×23949909² = 1147196282216562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23949907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 984 + ... + 6990.

It is an arithmetic number, because the mean of its divisors is an integer number (2889848).

Almost surely, 2^23949909 is an apocalyptic number.

It is an amenable number.

23949909 is a deficient number, since it is larger than the sum of its proper divisors (10728267).

23949909 is a wasteful number, since it uses less digits than its factorization.

23949909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6456 (or 6453 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 23949909 is about 4893.8644239496. The cubic root of 23949909 is about 288.2490972777.

The spelling of 23949909 in words is "twenty-three million, nine hundred forty-nine thousand, nine hundred nine".