129987119 has 2 divisors, whose sum is σ = 129987120. Its totient is φ = 129987118.

The previous prime is 129987103. The next prime is 129987139. The reversal of 129987119 is 911789921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129987119 - 2⁴ = 129987103 is a prime.

It is a super-2 number, since 2×129987119² = 33793302211840322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129987139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64993559 + 64993560.

It is an arithmetic number, because the mean of its divisors is an integer number (64993560).

Almost surely, 2^129987119 is an apocalyptic number.

129987119 is a deficient number, since it is larger than the sum of its proper divisors (1).

129987119 is an equidigital number, since it uses as much as digits as its factorization.

129987119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 47.

The square root of 129987119 is about 11401.1893677809. The cubic root of 129987119 is about 506.5629699391.

The spelling of 129987119 in words is "one hundred twenty-nine million, nine hundred eighty-seven thousand, one hundred nineteen".