129490489 has 4 divisors (see below), whose sum is σ = 130104400. Its totient is φ = 128876580.

The previous prime is 129490457. The next prime is 129490511. The reversal of 129490489 is 984094921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129490489 - 2⁵ = 129490457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129490189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306639 + ... + 307060.

It is an arithmetic number, because the mean of its divisors is an integer number (32526100).

Almost surely, 2^129490489 is an apocalyptic number.

It is an amenable number.

129490489 is a deficient number, since it is larger than the sum of its proper divisors (613911).

129490489 is an equidigital number, since it uses as much as digits as its factorization.

129490489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613910.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 129490489 is about 11379.3887797192. The cubic root of 129490489 is about 505.9170201953.

The spelling of 129490489 in words is "one hundred twenty-nine million, four hundred ninety thousand, four hundred eighty-nine".