1239129489 has 16 divisors (see below), whose sum is σ = 1836660224. Its totient is φ = 737942400.

The previous prime is 1239129481. The next prime is 1239129491. The reversal of 1239129489 is 9849219321.

It is not a de Polignac number, because 1239129489 - 2³ = 1239129481 is a prime.

It is a super-2 number, since 2×1239129489² = 3070883781018802242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1239129481) 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 15 ways as a sum of consecutive naturals, for example, 511252 + ... + 513669.

It is an arithmetic number, because the mean of its divisors is an integer number (114791264).

Almost surely, 2^1239129489 is an apocalyptic number.

It is an amenable number.

1239129489 is a deficient number, since it is larger than the sum of its proper divisors (597530735).

1239129489 is a wasteful number, since it uses less digits than its factorization.

1239129489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024968.

The product of its digits is 279936, while the sum is 48.

The square root of 1239129489 is about 35201.2711276170. The cubic root of 1239129489 is about 1074.0856083080.

The spelling of 1239129489 in words is "one billion, two hundred thirty-nine million, one hundred twenty-nine thousand, four hundred eighty-nine".