129892229 has 2 divisors, whose sum is σ = 129892230. Its totient is φ = 129892228.

The previous prime is 129892211. The next prime is 129892271. The reversal of 129892229 is 922298921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92352100 + 37540129 = 9610^2 + 6127^2 .

It is an emirp because it is prime and its reverse (922298921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129892229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129892229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129892129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64946114 + 64946115.

It is an arithmetic number, because the mean of its divisors is an integer number (64946115).

Almost surely, 2^129892229 is an apocalyptic number.

It is an amenable number.

129892229 is a deficient number, since it is larger than the sum of its proper divisors (1).

129892229 is an equidigital number, since it uses as much as digits as its factorization.

129892229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 129892229 is about 11397.0272001079. The cubic root of 129892229 is about 506.4396770525.

The spelling of 129892229 in words is "one hundred twenty-nine million, eight hundred ninety-two thousand, two hundred twenty-nine".