129013449 has 16 divisors (see below), whose sum is σ = 176074752. Its totient is φ = 83989008.

The previous prime is 129013447. The next prime is 129013519. The reversal of 129013449 is 944310921.

It is not a de Polignac number, because 129013449 - 2¹ = 129013447 is a prime.

It is a super-4 number, since 4×129013449⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (129013447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89952 + ... + 91374.

It is an arithmetic number, because the mean of its divisors is an integer number (11004672).

Almost surely, 2^129013449 is an apocalyptic number.

It is an amenable number.

129013449 is a deficient number, since it is larger than the sum of its proper divisors (47061303).

129013449 is a wasteful number, since it uses less digits than its factorization.

129013449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 129013449 is about 11358.4087353819. The cubic root of 129013449 is about 505.2949934807.

The spelling of 129013449 in words is "one hundred twenty-nine million, thirteen thousand, four hundred forty-nine".