129322387 has 2 divisors, whose sum is σ = 129322388. Its totient is φ = 129322386.

The previous prime is 129322381. The next prime is 129322411. The reversal of 129322387 is 783223921.

It is a weak prime.

It is an emirp because it is prime and its reverse (783223921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129322387 - 2¹¹ = 129320339 is a prime.

It is not a weakly prime, because it can be changed into another prime (129322381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64661193 + 64661194.

It is an arithmetic number, because the mean of its divisors is an integer number (64661194).

Almost surely, 2^129322387 is an apocalyptic number.

129322387 is a deficient number, since it is larger than the sum of its proper divisors (1).

129322387 is an equidigital number, since it uses as much as digits as its factorization.

129322387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 129322387 is about 11372.0001319029. Note that the first 3 decimals coincide. The cubic root of 129322387 is about 505.6980015588.

The spelling of 129322387 in words is "one hundred twenty-nine million, three hundred twenty-two thousand, three hundred eighty-seven".