129949406323 has 32 divisors (see below), whose sum is σ = 149933721600. Its totient is φ = 111538502400.

The previous prime is 129949406221. The next prime is 129949406369. The reversal of 129949406323 is 323604949921.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129949406323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129949400323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3214983 + ... + 3255151.

It is an arithmetic number, because the mean of its divisors is an integer number (4685428800).

Almost surely, 2^129949406323 is an apocalyptic number.

129949406323 is a deficient number, since it is larger than the sum of its proper divisors (19984315277).

129949406323 is a wasteful number, since it uses less digits than its factorization.

129949406323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40443.

The product of its (nonzero) digits is 2519424, while the sum is 52.

The spelling of 129949406323 in words is "one hundred twenty-nine billion, nine hundred forty-nine million, four hundred six thousand, three hundred twenty-three".