129223967 has 2 divisors, whose sum is σ = 129223968. Its totient is φ = 129223966.

The previous prime is 129223961. The next prime is 129223973. The reversal of 129223967 is 769322921.

It is a balanced prime because it is at equal distance from previous prime (129223961) and next prime (129223973).

It is a cyclic number.

It is not a de Polignac number, because 129223967 - 2⁸ = 129223711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129223961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64611983 + 64611984.

It is an arithmetic number, because the mean of its divisors is an integer number (64611984).

Almost surely, 2^129223967 is an apocalyptic number.

129223967 is a deficient number, since it is larger than the sum of its proper divisors (1).

129223967 is an equidigital number, since it uses as much as digits as its factorization.

129223967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 129223967 is about 11367.6720132136. The cubic root of 129223967 is about 505.5696828927.

The spelling of 129223967 in words is "one hundred twenty-nine million, two hundred twenty-three thousand, nine hundred sixty-seven".