129969099 has 24 divisors (see below), whose sum is σ = 202678112. Its totient is φ = 79781760.

The previous prime is 129969071. The next prime is 129969107. The reversal of 129969099 is 990969921.

It is a happy number.

It is not a de Polignac number, because 129969099 - 2¹⁹ = 129444811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129969599) 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 in 23 ways as a sum of consecutive naturals, for example, 55839 + ... + 58119.

Almost surely, 2^129969099 is an apocalyptic number.

129969099 is a deficient number, since it is larger than the sum of its proper divisors (72709013).

129969099 is a wasteful number, since it uses less digits than its factorization.

129969099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787 (or 2784 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 54.

The square root of 129969099 is about 11400.3990719623. The cubic root of 129969099 is about 506.5395607310.

The spelling of 129969099 in words is "one hundred twenty-nine million, nine hundred sixty-nine thousand, ninety-nine".