129397366 has 16 divisors (see below), whose sum is σ = 222798240. Its totient is φ = 55212480.

The previous prime is 129397337. The next prime is 129397393. The reversal of 129397366 is 663793921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16975 + ... + 23386.

It is an arithmetic number, because the mean of its divisors is an integer number (13924890).

Almost surely, 2^129397366 is an apocalyptic number.

129397366 is a deficient number, since it is larger than the sum of its proper divisors (93400874).

129397366 is a wasteful number, since it uses less digits than its factorization.

129397366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40599.

The product of its digits is 367416, while the sum is 46.

The square root of 129397366 is about 11375.2963038331. The cubic root of 129397366 is about 505.7957144809.

The spelling of 129397366 in words is "one hundred twenty-nine million, three hundred ninety-seven thousand, three hundred sixty-six".