129839733 has 16 divisors (see below), whose sum is σ = 193828800. Its totient is φ = 85896720.

The previous prime is 129839729. The next prime is 129839767. The reversal of 129839733 is 337938921.

It is not a de Polignac number, because 129839733 - 2² = 129839729 is a prime.

It is a super-2 number, since 2×129839733² = 33716712531022578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129839033) 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, 14818 + ... + 21891.

It is an arithmetic number, because the mean of its divisors is an integer number (12114300).

Almost surely, 2^129839733 is an apocalyptic number.

It is an amenable number.

129839733 is a deficient number, since it is larger than the sum of its proper divisors (63989067).

129839733 is a wasteful number, since it uses less digits than its factorization.

129839733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36849 (or 36843 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 129839733 is about 11394.7239106527. The cubic root of 129839733 is about 506.3714419218.

The spelling of 129839733 in words is "one hundred twenty-nine million, eight hundred thirty-nine thousand, seven hundred thirty-three".