129384831901 has 16 divisors (see below), whose sum is σ = 139868907696. Its totient is φ = 118977002496.

The previous prime is 129384831889. The next prime is 129384831911. The reversal of 129384831901 is 109138483921.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1742979001 + 127641852900 = 41749^2 + 357270^2 .

It is a cyclic number.

It is not a de Polignac number, because 129384831901 - 2⁵ = 129384831869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129384831911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12614091 + ... + 12624343.

It is an arithmetic number, because the mean of its divisors is an integer number (8741806731).

Almost surely, 2^129384831901 is an apocalyptic number.

It is an amenable number.

129384831901 is a deficient number, since it is larger than the sum of its proper divisors (10484075795).

129384831901 is a wasteful number, since it uses less digits than its factorization.

129384831901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13872.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 129384831901 in words is "one hundred twenty-nine billion, three hundred eighty-four million, eight hundred thirty-one thousand, nine hundred one".