23051909 has 4 divisors (see below), whose sum is σ = 23061516. Its totient is φ = 23042304.

The previous prime is 23051893. The next prime is 23051927. The reversal of 23051909 is 90915032.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15880225 + 7171684 = 3985^2 + 2678^2 .

It is a cyclic number.

It is not a de Polignac number, because 23051909 - 2⁴ = 23051893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23051969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207 + ... + 7139.

It is an arithmetic number, because the mean of its divisors is an integer number (5765379).

Almost surely, 2^23051909 is an apocalyptic number.

It is an amenable number.

23051909 is a deficient number, since it is larger than the sum of its proper divisors (9607).

23051909 is an equidigital number, since it uses as much as digits as its factorization.

23051909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9606.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 23051909 is about 4801.2403605735. The cubic root of 23051909 is about 284.6004825840.

The spelling of 23051909 in words is "twenty-three million, fifty-one thousand, nine hundred nine".