129822919 has 2 divisors, whose sum is σ = 129822920. Its totient is φ = 129822918.

The previous prime is 129822893. The next prime is 129822929. The reversal of 129822919 is 919228921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129822919 is a prime.

It is a super-2 number, since 2×129822919² = 33707980595361122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129822929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64911459 + 64911460.

It is an arithmetic number, because the mean of its divisors is an integer number (64911460).

Almost surely, 2^129822919 is an apocalyptic number.

129822919 is a deficient number, since it is larger than the sum of its proper divisors (1).

129822919 is an equidigital number, since it uses as much as digits as its factorization.

129822919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 43.

The square root of 129822919 is about 11393.9860891612. The cubic root of 129822919 is about 506.3495829300.

The spelling of 129822919 in words is "one hundred twenty-nine million, eight hundred twenty-two thousand, nine hundred nineteen".