123988229 has 2 divisors, whose sum is σ = 123988230. Its totient is φ = 123988228.

The previous prime is 123988219. The next prime is 123988231. The reversal of 123988229 is 922889321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123988225 + 4 = 11135^2 + 2^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123988229 is a prime.

Together with 123988231, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123988229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123988219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61994114 + 61994115.

It is an arithmetic number, because the mean of its divisors is an integer number (61994115).

Almost surely, 2^123988229 is an apocalyptic number.

It is an amenable number.

123988229 is a deficient number, since it is larger than the sum of its proper divisors (1).

123988229 is an equidigital number, since it uses as much as digits as its factorization.

123988229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 44.

The square root of 123988229 is about 11135.0001796138. Note that the first 3 decimals coincide. The cubic root of 123988229 is about 498.6473157910.

The spelling of 123988229 in words is "one hundred twenty-three million, nine hundred eighty-eight thousand, two hundred twenty-nine".