129373871 has 16 divisors (see below), whose sum is σ = 144218880. Its totient is φ = 115072320.

The previous prime is 129373837. The next prime is 129373879. The reversal of 129373871 is 178373921.

It is a de Polignac number, because none of the positive numbers 2^k-129373871 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 (129373879) 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, 100196 + ... + 101478.

It is an arithmetic number, because the mean of its divisors is an integer number (9013680).

Almost surely, 2^129373871 is an apocalyptic number.

129373871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129373871 is a deficient number, since it is larger than the sum of its proper divisors (14845009).

129373871 is a wasteful number, since it uses less digits than its factorization.

129373871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486.

The product of its digits is 63504, while the sum is 41.

The square root of 129373871 is about 11374.2635365988. The cubic root of 129373871 is about 505.7650997680.

Subtracting 129373871 from its reverse (178373921), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 129373871 in words is "one hundred twenty-nine million, three hundred seventy-three thousand, eight hundred seventy-one".