129900187 has 2 divisors, whose sum is σ = 129900188. Its totient is φ = 129900186.

The previous prime is 129900181. The next prime is 129900209. The reversal of 129900187 is 781009921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129900187 - 2⁷ = 129900059 is a prime.

It is not a weakly prime, because it can be changed into another prime (129900181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64950093 + 64950094.

It is an arithmetic number, because the mean of its divisors is an integer number (64950094).

Almost surely, 2^129900187 is an apocalyptic number.

129900187 is a deficient number, since it is larger than the sum of its proper divisors (1).

129900187 is an equidigital number, since it uses as much as digits as its factorization.

129900187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 129900187 is about 11397.3763208907. The cubic root of 129900187 is about 506.4500193819.

The spelling of 129900187 in words is "one hundred twenty-nine million, nine hundred thousand, one hundred eighty-seven".