129673199 has 2 divisors, whose sum is σ = 129673200. Its totient is φ = 129673198.

The previous prime is 129673177. The next prime is 129673231. The reversal of 129673199 is 991376921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129673199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129673169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64836599 + 64836600.

It is an arithmetic number, because the mean of its divisors is an integer number (64836600).

Almost surely, 2^129673199 is an apocalyptic number.

129673199 is a deficient number, since it is larger than the sum of its proper divisors (1).

129673199 is an equidigital number, since it uses as much as digits as its factorization.

129673199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 47.

The square root of 129673199 is about 11387.4140611466. The cubic root of 129673199 is about 506.1548566006.

The spelling of 129673199 in words is "one hundred twenty-nine million, six hundred seventy-three thousand, one hundred ninety-nine".