129133631 has 8 divisors (see below), whose sum is σ = 145417728. Its totient is φ = 113607000.

The previous prime is 129133619. The next prime is 129133639. The reversal of 129133631 is 136331921.

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

It is a cyclic number.

It is not a de Polignac number, because 129133631 - 2⁶ = 129133567 is a prime.

It is a super-2 number, since 2×129133631² = 33350989310488322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129133594 and 129133603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129133639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189005 + ... + 189686.

It is an arithmetic number, because the mean of its divisors is an integer number (18177216).

Almost surely, 2^129133631 is an apocalyptic number.

129133631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129133631 is a deficient number, since it is larger than the sum of its proper divisors (16284097).

129133631 is a wasteful number, since it uses less digits than its factorization.

129133631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378733.

The product of its digits is 2916, while the sum is 29.

The square root of 129133631 is about 11363.6979456513. The cubic root of 129133631 is about 505.4518466780.

The spelling of 129133631 in words is "one hundred twenty-nine million, one hundred thirty-three thousand, six hundred thirty-one".