129118459 has 2 divisors, whose sum is σ = 129118460. Its totient is φ = 129118458.

The previous prime is 129118421. The next prime is 129118463. The reversal of 129118459 is 954811921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129118459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129118489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64559229 + 64559230.

It is an arithmetic number, because the mean of its divisors is an integer number (64559230).

Almost surely, 2^129118459 is an apocalyptic number.

129118459 is a deficient number, since it is larger than the sum of its proper divisors (1).

129118459 is an equidigital number, since it uses as much as digits as its factorization.

129118459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 40.

The square root of 129118459 is about 11363.0303616597. The cubic root of 129118459 is about 505.4320506065.

The spelling of 129118459 in words is "one hundred twenty-nine million, one hundred eighteen thousand, four hundred fifty-nine".