129380946 has 8 divisors (see below), whose sum is σ = 258761904. Its totient is φ = 43126980.

The previous prime is 129380921. The next prime is 129380947. The reversal of 129380946 is 649083921.

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

129380946 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 129380898 and 129380907.

It is not an unprimeable number, because it can be changed into a prime (129380947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10781740 + ... + 10781751.

It is an arithmetic number, because the mean of its divisors is an integer number (32345238).

Almost surely, 2^129380946 is an apocalyptic number.

129380946 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129380946 is a wasteful number, since it uses less digits than its factorization.

129380946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21563496.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 129380946 is about 11374.5745414938. The cubic root of 129380946 is about 505.7743191022.

The spelling of 129380946 in words is "one hundred twenty-nine million, three hundred eighty thousand, nine hundred forty-six".