129824197 has 2 divisors, whose sum is σ = 129824198. Its totient is φ = 129824196.

The previous prime is 129824171. The next prime is 129824209. The reversal of 129824197 is 791428921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129823236 + 961 = 11394^2 + 31^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129824197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129824117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64912098 + 64912099.

It is an arithmetic number, because the mean of its divisors is an integer number (64912099).

Almost surely, 2^129824197 is an apocalyptic number.

It is an amenable number.

129824197 is a deficient number, since it is larger than the sum of its proper divisors (1).

129824197 is an equidigital number, since it uses as much as digits as its factorization.

129824197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 129824197 is about 11394.0421712402. The cubic root of 129824197 is about 506.3512444565.

The spelling of 129824197 in words is "one hundred twenty-nine million, eight hundred twenty-four thousand, one hundred ninety-seven".