129347797 has 2 divisors, whose sum is σ = 129347798. Its totient is φ = 129347796.

The previous prime is 129347783. The next prime is 129347857. The reversal of 129347797 is 797743921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129254161 + 93636 = 11369^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 129347797 - 2¹⁹ = 128823509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129347797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129347737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64673898 + 64673899.

It is an arithmetic number, because the mean of its divisors is an integer number (64673899).

Almost surely, 2^129347797 is an apocalyptic number.

It is an amenable number.

129347797 is a deficient number, since it is larger than the sum of its proper divisors (1).

129347797 is an equidigital number, since it uses as much as digits as its factorization.

129347797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 49.

The square root of 129347797 is about 11373.1172947438. The cubic root of 129347797 is about 505.7311201987.

The spelling of 129347797 in words is "one hundred twenty-nine million, three hundred forty-seven thousand, seven hundred ninety-seven".