129007499 has 4 divisors (see below), whose sum is σ = 129057864. Its totient is φ = 128957136.

The previous prime is 129007471. The next prime is 129007517. The reversal of 129007499 is 994700921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 994700921 = 2677 ⋅371573.

It is a cyclic number.

It is not a de Polignac number, because 129007499 - 2⁸ = 129007243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129007699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21122 + ... + 26535.

It is an arithmetic number, because the mean of its divisors is an integer number (32264466).

Almost surely, 2^129007499 is an apocalyptic number.

129007499 is a deficient number, since it is larger than the sum of its proper divisors (50365).

129007499 is an equidigital number, since it uses as much as digits as its factorization.

129007499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50364.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 129007499 is about 11358.1468118703. The cubic root of 129007499 is about 505.2872254239.

The spelling of 129007499 in words is "one hundred twenty-nine million, seven thousand, four hundred ninety-nine".