129749759 has 2 divisors, whose sum is σ = 129749760. Its totient is φ = 129749758.

The previous prime is 129749747. The next prime is 129749773. The reversal of 129749759 is 957947921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129749759 - 2²⁴ = 112972543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129749759.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129749359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64874879 + 64874880.

It is an arithmetic number, because the mean of its divisors is an integer number (64874880).

Almost surely, 2^129749759 is an apocalyptic number.

129749759 is a deficient number, since it is larger than the sum of its proper divisors (1).

129749759 is an equidigital number, since it uses as much as digits as its factorization.

129749759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 53.

The square root of 129749759 is about 11390.7751711637. The cubic root of 129749759 is about 506.2544495062.

The spelling of 129749759 in words is "one hundred twenty-nine million, seven hundred forty-nine thousand, seven hundred fifty-nine".