129208894 has 16 divisors (see below), whose sum is σ = 206946432. Its totient is φ = 60357528.

The previous prime is 129208867. The next prime is 129208901. The reversal of 129208894 is 498802921.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 129208894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30684 + ... + 34639.

It is an arithmetic number, because the mean of its divisors is an integer number (12934152).

Almost surely, 2^129208894 is an apocalyptic number.

129208894 is a deficient number, since it is larger than the sum of its proper divisors (77737538).

129208894 is a wasteful number, since it uses less digits than its factorization.

129208894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65391.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 129208894 is about 11367.0090173273. The cubic root of 129208894 is about 505.5500251664.

The spelling of 129208894 in words is "one hundred twenty-nine million, two hundred eight thousand, eight hundred ninety-four".