129923222 has 16 divisors (see below), whose sum is σ = 228956112. Its totient is φ = 54513120.

The previous prime is 129923207. The next prime is 129923237. The reversal of 129923222 is 222329921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129923207) and next prime (129923237).

It is a super-2 number, since 2×129923222² = 33760087229722568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 226853 + ... + 227424.

It is an arithmetic number, because the mean of its divisors is an integer number (14309757).

Almost surely, 2^129923222 is an apocalyptic number.

129923222 is a deficient number, since it is larger than the sum of its proper divisors (99032890).

129923222 is a wasteful number, since it uses less digits than its factorization.

129923222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454303.

The product of its digits is 7776, while the sum is 32.

The square root of 129923222 is about 11398.3868156858. The cubic root of 129923222 is about 506.4799536131.

The spelling of 129923222 in words is "one hundred twenty-nine million, nine hundred twenty-three thousand, two hundred twenty-two".