23929 has 2 divisors, whose sum is σ = 23930. Its totient is φ = 23928.

The previous prime is 23917. The next prime is 23957. The reversal of 23929 is 92932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21904 + 2025 = 148^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 23929 - 2⁷ = 23801 is a prime.

23929 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11964 + 11965.

It is an arithmetic number, because the mean of its divisors is an integer number (11965).

2²³⁹²⁹ is an apocalyptic number.

It is an amenable number.

23929 is a deficient number, since it is larger than the sum of its proper divisors (1).

23929 is an equidigital number, since it uses as much as digits as its factorization.

23929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 25.

The square root of 23929 is about 154.6900126059. The cubic root of 23929 is about 28.8165189441.

It can be divided in two parts, 2392 and 9, that multiplied together give a triangular number (21528 = T₂₀₇).

The spelling of 23929 in words is "twenty-three thousand, nine hundred twenty-nine".