129395394 has 20 divisors (see below), whose sum is σ = 289941894. Its totient is φ = 43131744.

The previous prime is 129395369. The next prime is 129395411. The reversal of 129395394 is 493593921.

It can be written as a sum of positive squares in only one way, i.e., 118004769 + 11390625 = 10863^2 + 3375^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 399207 + ... + 399530.

Almost surely, 2^129395394 is an apocalyptic number.

129395394 is an abundant number, since it is smaller than the sum of its proper divisors (160546500).

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

129395394 is an equidigital number, since it uses as much as digits as its factorization.

129395394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798751 (or 798742 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 129395394 is about 11375.2096244421. The cubic root of 129395394 is about 505.7931450463.

The spelling of 129395394 in words is "one hundred twenty-nine million, three hundred ninety-five thousand, three hundred ninety-four".