23109971 has 2 divisors, whose sum is σ = 23109972. Its totient is φ = 23109970.

The previous prime is 23109943. The next prime is 23109979. The reversal of 23109971 is 17990132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23109971 is a prime.

It is not a weakly prime, because it can be changed into another prime (23109979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11554985 + 11554986.

It is an arithmetic number, because the mean of its divisors is an integer number (11554986).

Almost surely, 2^23109971 is an apocalyptic number.

23109971 is a deficient number, since it is larger than the sum of its proper divisors (1).

23109971 is an equidigital number, since it uses as much as digits as its factorization.

23109971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 23109971 is about 4807.2831204330. The cubic root of 23109971 is about 284.8392280884.

The spelling of 23109971 in words is "twenty-three million, one hundred nine thousand, nine hundred seventy-one".