129749683291 has 2 divisors, whose sum is σ = 129749683292. Its totient is φ = 129749683290.

The previous prime is 129749683247. The next prime is 129749683307. The reversal of 129749683291 is 192386947921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129749683291 - 2¹⁵ = 129749650523 is a prime.

It is a super-2 number, since 2×129749683291² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129749683241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64874841645 + 64874841646.

It is an arithmetic number, because the mean of its divisors is an integer number (64874841646).

Almost surely, 2^129749683291 is an apocalyptic number.

129749683291 is a deficient number, since it is larger than the sum of its proper divisors (1).

129749683291 is an equidigital number, since it uses as much as digits as its factorization.

129749683291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 61.

The spelling of 129749683291 in words is "one hundred twenty-nine billion, seven hundred forty-nine million, six hundred eighty-three thousand, two hundred ninety-one".