129991703 has 2 divisors, whose sum is σ = 129991704. Its totient is φ = 129991702.

The previous prime is 129991663. The next prime is 129991751. The reversal of 129991703 is 307199921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129991703 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129991003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64995851 + 64995852.

It is an arithmetic number, because the mean of its divisors is an integer number (64995852).

Almost surely, 2^129991703 is an apocalyptic number.

129991703 is a deficient number, since it is larger than the sum of its proper divisors (1).

129991703 is an equidigital number, since it uses as much as digits as its factorization.

129991703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 129991703 is about 11401.3903976664. The cubic root of 129991703 is about 506.5689245224.

The spelling of 129991703 in words is "one hundred twenty-nine million, nine hundred ninety-one thousand, seven hundred three".