129066946 has 4 divisors (see below), whose sum is σ = 193600422. Its totient is φ = 64533472.

The previous prime is 129066923. The next prime is 129066967. The reversal of 129066946 is 649660921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 66830625 + 62236321 = 8175^2 + 7889^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32266735 + ... + 32266738.

Almost surely, 2^129066946 is an apocalyptic number.

129066946 is a deficient number, since it is larger than the sum of its proper divisors (64533476).

129066946 is an equidigital number, since it uses as much as digits as its factorization.

129066946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64533475.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 129066946 is about 11360.7634426565. The cubic root of 129066946 is about 505.3648260731.

The spelling of 129066946 in words is "one hundred twenty-nine million, sixty-six thousand, nine hundred forty-six".