129312703 has 4 divisors (see below), whose sum is σ = 139259848. Its totient is φ = 119365560.

The previous prime is 129312691. The next prime is 129312709. The reversal of 129312703 is 307213921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129312703 - 2²¹ = 127215551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129312709) 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 3 ways as a sum of consecutive naturals, for example, 4973553 + ... + 4973578.

It is an arithmetic number, because the mean of its divisors is an integer number (34814962).

Almost surely, 2^129312703 is an apocalyptic number.

129312703 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129312703 is a deficient number, since it is larger than the sum of its proper divisors (9947145).

129312703 is an equidigital number, since it uses as much as digits as its factorization.

129312703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9947144.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 129312703 is about 11371.5743413126. The cubic root of 129312703 is about 505.6853785788.

The spelling of 129312703 in words is "one hundred twenty-nine million, three hundred twelve thousand, seven hundred three".