129822997 has 2 divisors, whose sum is σ = 129822998. Its totient is φ = 129822996.

The previous prime is 129822949. The next prime is 129823013. The reversal of 129822997 is 799228921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96020401 + 33802596 = 9799^2 + 5814^2 .

It is an emirp because it is prime and its reverse (799228921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129822997 - 2¹¹ = 129820949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129822997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129820997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64911498 + 64911499.

It is an arithmetic number, because the mean of its divisors is an integer number (64911499).

Almost surely, 2^129822997 is an apocalyptic number.

It is an amenable number.

129822997 is a deficient number, since it is larger than the sum of its proper divisors (1).

129822997 is an equidigital number, since it uses as much as digits as its factorization.

129822997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 129822997 is about 11393.9895120190. The cubic root of 129822997 is about 506.3496843380.

The spelling of 129822997 in words is "one hundred twenty-nine million, eight hundred twenty-two thousand, nine hundred ninety-seven".