129984697 has 2 divisors, whose sum is σ = 129984698. Its totient is φ = 129984696.

The previous prime is 129984671. The next prime is 129984709. The reversal of 129984697 is 796489921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80084601 + 49900096 = 8949^2 + 7064^2 .

It is an emirp because it is prime and its reverse (796489921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129984697 is a prime.

It is not a weakly prime, because it can be changed into another prime (129984097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64992348 + 64992349.

It is an arithmetic number, because the mean of its divisors is an integer number (64992349).

Almost surely, 2^129984697 is an apocalyptic number.

It is an amenable number.

129984697 is a deficient number, since it is larger than the sum of its proper divisors (1).

129984697 is an equidigital number, since it uses as much as digits as its factorization.

129984697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 55.

The square root of 129984697 is about 11401.0831502976. The cubic root of 129984697 is about 506.5598237219.

The spelling of 129984697 in words is "one hundred twenty-nine million, nine hundred eighty-four thousand, six hundred ninety-seven".