129969894 has 16 divisors (see below), whose sum is σ = 264201840. Its totient is φ = 42612960.

The previous prime is 129969893. The next prime is 129969911. The reversal of 129969894 is 498969921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129969893) 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 7 ways as a sum of consecutive naturals, for example, 177189 + ... + 177920.

It is an arithmetic number, because the mean of its divisors is an integer number (16512615).

Almost surely, 2^129969894 is an apocalyptic number.

129969894 is an abundant number, since it is smaller than the sum of its proper divisors (134231946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129969894 is a wasteful number, since it uses less digits than its factorization.

129969894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355175.

The product of its digits is 2519424, while the sum is 57.

The square root of 129969894 is about 11400.4339391095. The cubic root of 129969894 is about 506.5405935358.

The spelling of 129969894 in words is "one hundred twenty-nine million, nine hundred sixty-nine thousand, eight hundred ninety-four".