129501706 has 4 divisors (see below), whose sum is σ = 194252562. Its totient is φ = 64750852.

The previous prime is 129501683. The next prime is 129501709. The reversal of 129501706 is 607105921.

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

It can be written as a sum of positive squares in only one way, i.e., 123543225 + 5958481 = 11115^2 + 2441^2 .

It is not an unprimeable number, because it can be changed into a prime (129501709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32375425 + ... + 32375428.

Almost surely, 2^129501706 is an apocalyptic number.

129501706 is a deficient number, since it is larger than the sum of its proper divisors (64750856).

129501706 is an equidigital number, since it uses as much as digits as its factorization.

129501706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64750855.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 129501706 is about 11379.8816338308. The cubic root of 129501706 is about 505.9316279795.

The spelling of 129501706 in words is "one hundred twenty-nine million, five hundred one thousand, seven hundred six".