23906681 has 2 divisors, whose sum is σ = 23906682. Its totient is φ = 23906680.

The previous prime is 23906677. The next prime is 23906711. The reversal of 23906681 is 18660932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19219456 + 4687225 = 4384^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 23906681 - 2² = 23906677 is a prime.

It is a super-2 number, since 2×23906681² = 1143058792871522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23906621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11953340 + 11953341.

It is an arithmetic number, because the mean of its divisors is an integer number (11953341).

Almost surely, 2^23906681 is an apocalyptic number.

It is an amenable number.

23906681 is a deficient number, since it is larger than the sum of its proper divisors (1).

23906681 is an equidigital number, since it uses as much as digits as its factorization.

23906681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 23906681 is about 4889.4458786247. The cubic root of 23906681 is about 288.0755693219.

The spelling of 23906681 in words is "twenty-three million, nine hundred six thousand, six hundred eighty-one".