23661427 has 4 divisors (see below), whose sum is σ = 23675176. Its totient is φ = 23647680.

The previous prime is 23661359. The next prime is 23661431. The reversal of 23661427 is 72416632.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23661427 - 2¹¹ = 23659379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23661487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3849 + ... + 7882.

It is an arithmetic number, because the mean of its divisors is an integer number (5918794).

Almost surely, 2^23661427 is an apocalyptic number.

23661427 is a deficient number, since it is larger than the sum of its proper divisors (13749).

23661427 is a wasteful number, since it uses less digits than its factorization.

23661427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13748.

The product of its digits is 12096, while the sum is 31.

The square root of 23661427 is about 4864.3012858991. The cubic root of 23661427 is about 287.0870775446.

The spelling of 23661427 in words is "twenty-three million, six hundred sixty-one thousand, four hundred twenty-seven".