129840964 has 12 divisors (see below), whose sum is σ = 247878288. Its totient is φ = 59018600.

The previous prime is 129840961. The next prime is 129840983. The reversal of 129840964 is 469048921.

129840964 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 129840964.

It is not an unprimeable number, because it can be changed into a prime (129840961) 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, 1475422 + ... + 1475509.

It is an arithmetic number, because the mean of its divisors is an integer number (20656524).

Almost surely, 2^129840964 is an apocalyptic number.

It is an amenable number.

129840964 is a deficient number, since it is larger than the sum of its proper divisors (118037324).

129840964 is a wasteful number, since it uses less digits than its factorization.

129840964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950946 (or 2950944 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 129840964 is about 11394.7779267522. Note that the first 3 decimals coincide. The cubic root of 129840964 is about 506.3730422056.

The spelling of 129840964 in words is "one hundred twenty-nine million, eight hundred forty thousand, nine hundred sixty-four".