129661411 has 8 divisors (see below), whose sum is σ = 141763824. Its totient is φ = 117611520.

The previous prime is 129661387. The next prime is 129661421. The reversal of 129661411 is 114166921.

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 129661411 - 2⁵ = 129661379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129661421) 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, 7870 + ... + 17923.

It is an arithmetic number, because the mean of its divisors is an integer number (17720478).

Almost surely, 2^129661411 is an apocalyptic number.

129661411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129661411 is a deficient number, since it is larger than the sum of its proper divisors (12102413).

129661411 is a wasteful number, since it uses less digits than its factorization.

129661411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26261.

The product of its digits is 2592, while the sum is 31.

The square root of 129661411 is about 11386.8964604057. The cubic root of 129661411 is about 506.1395187248.

The spelling of 129661411 in words is "one hundred twenty-nine million, six hundred sixty-one thousand, four hundred eleven".