129838071 has 16 divisors (see below), whose sum is σ = 189116928. Its totient is φ = 78580800.

The previous prime is 129838067. The next prime is 129838087. The reversal of 129838071 is 170838921.

It is not a de Polignac number, because 129838071 - 2² = 129838067 is a prime.

It is a super-3 number, since 3×129838071³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129838091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25986 + ... + 30576.

It is an arithmetic number, because the mean of its divisors is an integer number (11819808).

Almost surely, 2^129838071 is an apocalyptic number.

129838071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129838071 is a deficient number, since it is larger than the sum of its proper divisors (59278857).

129838071 is a wasteful number, since it uses less digits than its factorization.

129838071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5462.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 129838071 is about 11394.6509819301. The cubic root of 129838071 is about 506.3692813276.

The spelling of 129838071 in words is "one hundred twenty-nine million, eight hundred thirty-eight thousand, seventy-one".