129835965 has 16 divisors (see below), whose sum is σ = 237414528. Its totient is φ = 59353536.

The previous prime is 129835933. The next prime is 129835973. The reversal of 129835965 is 569538921.

It is a happy number.

It is not a de Polignac number, because 129835965 - 2⁵ = 129835933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618162 + ... + 618371.

It is an arithmetic number, because the mean of its divisors is an integer number (14838408).

Almost surely, 2^129835965 is an apocalyptic number.

129835965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129835965 is a deficient number, since it is larger than the sum of its proper divisors (107578563).

129835965 is a wasteful number, since it uses less digits than its factorization.

129835965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236548.

The product of its digits is 583200, while the sum is 48.

The square root of 129835965 is about 11394.5585697736. The cubic root of 129835965 is about 506.3665435084.

The spelling of 129835965 in words is "one hundred twenty-nine million, eight hundred thirty-five thousand, nine hundred sixty-five".