129497723 has 2 divisors, whose sum is σ = 129497724. Its totient is φ = 129497722.

The previous prime is 129497707. The next prime is 129497741. The reversal of 129497723 is 327794921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129497723 - 2⁴ = 129497707 is a prime.

It is not a weakly prime, because it can be changed into another prime (129497773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64748861 + 64748862.

It is an arithmetic number, because the mean of its divisors is an integer number (64748862).

Almost surely, 2^129497723 is an apocalyptic number.

129497723 is a deficient number, since it is larger than the sum of its proper divisors (1).

129497723 is an equidigital number, since it uses as much as digits as its factorization.

129497723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 129497723 is about 11379.7066306650. The cubic root of 129497723 is about 505.9264410560.

The spelling of 129497723 in words is "one hundred twenty-nine million, four hundred ninety-seven thousand, seven hundred twenty-three".