23129971 has 2 divisors, whose sum is σ = 23129972. Its totient is φ = 23129970.

The previous prime is 23129963. The next prime is 23129983. The reversal of 23129971 is 17992132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23129971 - 2³ = 23129963 is a prime.

It is not a weakly prime, because it can be changed into another prime (23129471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11564985 + 11564986.

It is an arithmetic number, because the mean of its divisors is an integer number (11564986).

Almost surely, 2^23129971 is an apocalyptic number.

23129971 is a deficient number, since it is larger than the sum of its proper divisors (1).

23129971 is an equidigital number, since it uses as much as digits as its factorization.

23129971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 23129971 is about 4809.3628476130. The cubic root of 23129971 is about 284.9213736115.

The spelling of 23129971 in words is "twenty-three million, one hundred twenty-nine thousand, nine hundred seventy-one".