129789637 has 4 divisors (see below), whose sum is σ = 129902400. Its totient is φ = 129676876.

The previous prime is 129789619. The next prime is 129789659. The reversal of 129789637 is 736987921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 736987921 = 113 ⋅6522017.

It is a cyclic number.

It is not a de Polignac number, because 129789637 - 2¹¹ = 129787589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129789677) 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, 54637 + ... + 56962.

It is an arithmetic number, because the mean of its divisors is an integer number (32475600).

Almost surely, 2^129789637 is an apocalyptic number.

It is an amenable number.

129789637 is a deficient number, since it is larger than the sum of its proper divisors (112763).

129789637 is a wasteful number, since it uses less digits than its factorization.

129789637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112762.

The product of its digits is 1143072, while the sum is 52.

The square root of 129789637 is about 11392.5254882313. The cubic root of 129789637 is about 506.3063091966.

The spelling of 129789637 in words is "one hundred twenty-nine million, seven hundred eighty-nine thousand, six hundred thirty-seven".