129066391 has 8 divisors (see below), whose sum is σ = 129952368. Its totient is φ = 128184000.

The previous prime is 129066383. The next prime is 129066407. The reversal of 129066391 is 193660921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129066391 - 2³ = 129066383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129066391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129061391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117756 + ... + 118846.

It is an arithmetic number, because the mean of its divisors is an integer number (16244046).

Almost surely, 2^129066391 is an apocalyptic number.

129066391 is a deficient number, since it is larger than the sum of its proper divisors (885977).

129066391 is a wasteful number, since it uses less digits than its factorization.

129066391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 129066391 is about 11360.7390164549. The cubic root of 129066391 is about 505.3641017000.

The spelling of 129066391 in words is "one hundred twenty-nine million, sixty-six thousand, three hundred ninety-one".