129949359 has 4 divisors (see below), whose sum is σ = 173265816. Its totient is φ = 86632904.

The previous prime is 129949331. The next prime is 129949363. The reversal of 129949359 is 953949921.

It is a happy number.

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 129949359 - 2¹⁷ = 129818287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129949399) 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, 21658224 + ... + 21658229.

It is an arithmetic number, because the mean of its divisors is an integer number (43316454).

Almost surely, 2^129949359 is an apocalyptic number.

129949359 is a deficient number, since it is larger than the sum of its proper divisors (43316457).

129949359 is an equidigital number, since it uses as much as digits as its factorization.

129949359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43316456.

The product of its digits is 787320, while the sum is 51.

The square root of 129949359 is about 11399.5332799198. The cubic root of 129949359 is about 506.5139146421.

The spelling of 129949359 in words is "one hundred twenty-nine million, nine hundred forty-nine thousand, three hundred fifty-nine".