129869739 has 12 divisors (see below), whose sum is σ = 189448272. Its totient is φ = 85722000.

The previous prime is 129869737. The next prime is 129869767. The reversal of 129869739 is 937968921.

It is not a de Polignac number, because 129869739 - 2¹ = 129869737 is a prime.

It is a super-2 number, since 2×129869739² = 33732298215856242, which contains 22 as substring.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (129869737) 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 11 ways as a sum of consecutive naturals, for example, 70527 + ... + 72344.

It is an arithmetic number, because the mean of its divisors is an integer number (15787356).

Almost surely, 2^129869739 is an apocalyptic number.

129869739 is a deficient number, since it is larger than the sum of its proper divisors (59578533).

129869739 is a wasteful number, since it uses less digits than its factorization.

129869739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142978 (or 142975 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 129869739 is about 11396.0404965935. The cubic root of 129869739 is about 506.4104464464.

The spelling of 129869739 in words is "one hundred twenty-nine million, eight hundred sixty-nine thousand, seven hundred thirty-nine".