23779905 has 16 divisors (see below), whose sum is σ = 38109120. Its totient is φ = 12662208.

The previous prime is 23779897. The next prime is 23779909. The reversal of 23779905 is 50997732.

It is not a de Polignac number, because 23779905 - 2³ = 23779897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23779909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15294 + ... + 16776.

It is an arithmetic number, because the mean of its divisors is an integer number (2381820).

Almost surely, 2^23779905 is an apocalyptic number.

It is an amenable number.

23779905 is a deficient number, since it is larger than the sum of its proper divisors (14329215).

23779905 is a wasteful number, since it uses less digits than its factorization.

23779905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560.

The product of its (nonzero) digits is 119070, while the sum is 42.

The square root of 23779905 is about 4876.4643954406. The cubic root of 23779905 is about 287.5654494975.

The spelling of 23779905 in words is "twenty-three million, seven hundred seventy-nine thousand, nine hundred five".