129071031 has 8 divisors (see below), whose sum is σ = 173799024. Its totient is φ = 85195200.

The previous prime is 129071027. The next prime is 129071039. The reversal of 129071031 is 130170921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129071031 - 2² = 129071027 is a prime.

It is a super-2 number, since 2×129071031² = 33318662086805922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129070992 and 129071010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129071039) 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 7 ways as a sum of consecutive naturals, for example, 212686 + ... + 213291.

It is an arithmetic number, because the mean of its divisors is an integer number (21724878).

Almost surely, 2^129071031 is an apocalyptic number.

129071031 is a deficient number, since it is larger than the sum of its proper divisors (44727993).

129071031 is a wasteful number, since it uses less digits than its factorization.

129071031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426081.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 129071031 is about 11360.9432266868. The cubic root of 129071031 is about 505.3701576564.

The spelling of 129071031 in words is "one hundred twenty-nine million, seventy-one thousand, thirty-one".