129222913 has 2 divisors, whose sum is σ = 129222914. Its totient is φ = 129222912.

The previous prime is 129222893. The next prime is 129222923. The reversal of 129222913 is 319222921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120626289 + 8596624 = 10983^2 + 2932^2 .

It is a cyclic number.

It is not a de Polignac number, because 129222913 - 2¹⁷ = 129091841 is a prime.

It is a super-2 number, since 2×129222913² = 33397122488411138, which contains 22 as substring.

It is equal to p_7336624 and since 129222913 and 7336624 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (129222923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64611456 + 64611457.

It is an arithmetic number, because the mean of its divisors is an integer number (64611457).

Almost surely, 2^129222913 is an apocalyptic number.

It is an amenable number.

129222913 is a deficient number, since it is larger than the sum of its proper divisors (1).

129222913 is an equidigital number, since it uses as much as digits as its factorization.

129222913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 129222913 is about 11367.6256535831. The cubic root of 129222913 is about 505.5683083492.

The spelling of 129222913 in words is "one hundred twenty-nine million, two hundred twenty-two thousand, nine hundred thirteen".