129949166 has 4 divisors (see below), whose sum is σ = 194923752. Its totient is φ = 64974582.

The previous prime is 129949159. The next prime is 129949181. The reversal of 129949166 is 661949921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 661949921 = 587 ⋅1127683.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129949166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32487290 + ... + 32487293.

It is an arithmetic number, because the mean of its divisors is an integer number (48730938).

Almost surely, 2^129949166 is an apocalyptic number.

129949166 is a deficient number, since it is larger than the sum of its proper divisors (64974586).

129949166 is an equidigital number, since it uses as much as digits as its factorization.

129949166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64974585.

The product of its digits is 209952, while the sum is 47.

The square root of 129949166 is about 11399.5248146578. The cubic root of 129949166 is about 506.5136638849.

The spelling of 129949166 in words is "one hundred twenty-nine million, nine hundred forty-nine thousand, one hundred sixty-six".