129969131 has 8 divisors (see below), whose sum is σ = 138189744. Its totient is φ = 121812480.

The previous prime is 129969109. The next prime is 129969137. The reversal of 129969131 is 131969921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129969131 - 2¹⁰ = 129968107 is a prime.

It is a super-2 number, since 2×129969131² = 33783950025790322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129969137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11765 + ... + 19958.

It is an arithmetic number, because the mean of its divisors is an integer number (17273718).

Almost surely, 2^129969131 is an apocalyptic number.

129969131 is a deficient number, since it is larger than the sum of its proper divisors (8220613).

129969131 is a wasteful number, since it uses less digits than its factorization.

129969131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31981.

The product of its digits is 26244, while the sum is 41.

The square root of 129969131 is about 11400.4004754219. The cubic root of 129969131 is about 506.5396023031.

The spelling of 129969131 in words is "one hundred twenty-nine million, nine hundred sixty-nine thousand, one hundred thirty-one".