129305394 has 12 divisors (see below), whose sum is σ = 280161726. Its totient is φ = 43101792.

The previous prime is 129305389. The next prime is 129305399. The reversal of 129305394 is 493503921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129305389) and next prime (129305399).

It can be written as a sum of positive squares in only one way, i.e., 116964225 + 12341169 = 10815^2 + 3513^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (129305399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3591799 + ... + 3591834.

Almost surely, 2^129305394 is an apocalyptic number.

129305394 is an abundant number, since it is smaller than the sum of its proper divisors (150856332).

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

129305394 is a wasteful number, since it uses less digits than its factorization.

129305394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7183641 (or 7183638 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 129305394 is about 11371.2529652629. The cubic root of 129305394 is about 505.6758509661.

The spelling of 129305394 in words is "one hundred twenty-nine million, three hundred five thousand, three hundred ninety-four".