129684311 has 2 divisors, whose sum is σ = 129684312. Its totient is φ = 129684310.

The previous prime is 129684287. The next prime is 129684323. The reversal of 129684311 is 113486921.

It is a strong prime.

It is an emirp because it is prime and its reverse (113486921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129684311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129684341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64842155 + 64842156.

It is an arithmetic number, because the mean of its divisors is an integer number (64842156).

Almost surely, 2^129684311 is an apocalyptic number.

129684311 is a deficient number, since it is larger than the sum of its proper divisors (1).

129684311 is an equidigital number, since it uses as much as digits as its factorization.

129684311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 129684311 is about 11387.9019577796. The cubic root of 129684311 is about 506.1693140525.

The spelling of 129684311 in words is "one hundred twenty-nine million, six hundred eighty-four thousand, three hundred eleven".