129746387 has 2 divisors, whose sum is σ = 129746388. Its totient is φ = 129746386.

The previous prime is 129746339. The next prime is 129746389. The reversal of 129746387 is 783647921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129746387 - 2¹⁶ = 129680851 is a prime.

Together with 129746389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129746389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64873193 + 64873194.

It is an arithmetic number, because the mean of its divisors is an integer number (64873194).

Almost surely, 2^129746387 is an apocalyptic number.

129746387 is a deficient number, since it is larger than the sum of its proper divisors (1).

129746387 is an equidigital number, since it uses as much as digits as its factorization.

129746387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 129746387 is about 11390.6271556925. The cubic root of 129746387 is about 506.2500638724.

The spelling of 129746387 in words is "one hundred twenty-nine million, seven hundred forty-six thousand, three hundred eighty-seven".