129759891 has 8 divisors (see below), whose sum is σ = 178979280. Its totient is φ = 83523552.

The previous prime is 129759869. The next prime is 129759919. The reversal of 129759891 is 198957921.

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

It is not a de Polignac number, because 129759891 - 2¹⁸ = 129497747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129759841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745660 + ... + 745833.

It is an arithmetic number, because the mean of its divisors is an integer number (22372410).

Almost surely, 2^129759891 is an apocalyptic number.

129759891 is a deficient number, since it is larger than the sum of its proper divisors (49219389).

129759891 is a wasteful number, since it uses less digits than its factorization.

129759891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491525.

The product of its digits is 408240, while the sum is 51.

The square root of 129759891 is about 11391.2199083329. The cubic root of 129759891 is about 506.2676267601.

The spelling of 129759891 in words is "one hundred twenty-nine million, seven hundred fifty-nine thousand, eight hundred ninety-one".