129241799 has 4 divisors (see below), whose sum is σ = 132394080. Its totient is φ = 126089520.

The previous prime is 129241787. The next prime is 129241813. The reversal of 129241799 is 997142921.

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

It is a cyclic number.

It is not a de Polignac number, because 129241799 - 2⁸ = 129241543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129241199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576079 + ... + 1576160.

It is an arithmetic number, because the mean of its divisors is an integer number (33098520).

Almost surely, 2^129241799 is an apocalyptic number.

129241799 is a deficient number, since it is larger than the sum of its proper divisors (3152281).

129241799 is an equidigital number, since it uses as much as digits as its factorization.

129241799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152280.

The product of its digits is 81648, while the sum is 44.

The square root of 129241799 is about 11368.4563156130. The cubic root of 129241799 is about 505.5929368451.

The spelling of 129241799 in words is "one hundred twenty-nine million, two hundred forty-one thousand, seven hundred ninety-nine".