123381229 has 2 divisors, whose sum is σ = 123381230. Its totient is φ = 123381228.

The previous prime is 123381227. The next prime is 123381239. The reversal of 123381229 is 922183321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122988100 + 393129 = 11090^2 + 627^2 .

It is a cyclic number.

It is not a de Polignac number, because 123381229 - 2¹ = 123381227 is a prime.

Together with 123381227, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 123381229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123381221) 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, 61690614 + 61690615.

It is an arithmetic number, because the mean of its divisors is an integer number (61690615).

Almost surely, 2^123381229 is an apocalyptic number.

It is an amenable number.

123381229 is a deficient number, since it is larger than the sum of its proper divisors (1).

123381229 is an equidigital number, since it uses as much as digits as its factorization.

123381229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 123381229 is about 11107.7103401196. The cubic root of 123381229 is about 497.8322540033.

The spelling of 123381229 in words is "one hundred twenty-three million, three hundred eighty-one thousand, two hundred twenty-nine".