129669494 has 16 divisors (see below), whose sum is σ = 197709120. Its totient is φ = 63772800.

The previous prime is 129669473. The next prime is 129669521. The reversal of 129669494 is 494966921.

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, 44894 + ... + 47694.

It is an arithmetic number, because the mean of its divisors is an integer number (12356820).

Almost surely, 2^129669494 is an apocalyptic number.

129669494 is a deficient number, since it is larger than the sum of its proper divisors (68039626).

129669494 is a wasteful number, since it uses less digits than its factorization.

129669494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175.

The product of its digits is 839808, while the sum is 50.

The square root of 129669494 is about 11387.2513803815. The cubic root of 129669494 is about 506.1500359653.

The spelling of 129669494 in words is "one hundred twenty-nine million, six hundred sixty-nine thousand, four hundred ninety-four".