129031471 has 2 divisors, whose sum is σ = 129031472. Its totient is φ = 129031470.

The previous prime is 129031457. The next prime is 129031477. The reversal of 129031471 is 174130921.

It is a strong prime.

It is an emirp because it is prime and its reverse (174130921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129031471 is a prime.

It is a super-3 number, since 3×129031471³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129031477) 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 as a sum of consecutive naturals, namely, 64515735 + 64515736.

It is an arithmetic number, because the mean of its divisors is an integer number (64515736).

Almost surely, 2^129031471 is an apocalyptic number.

129031471 is a deficient number, since it is larger than the sum of its proper divisors (1).

129031471 is an equidigital number, since it uses as much as digits as its factorization.

129031471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 129031471 is about 11359.2020406365. The cubic root of 129031471 is about 505.3185207498.

It can be divided in two parts, 1290 and 31471, that added together give a square (32761 = 181²).

The spelling of 129031471 in words is "one hundred twenty-nine million, thirty-one thousand, four hundred seventy-one".