123938669 has 2 divisors, whose sum is σ = 123938670. Its totient is φ = 123938668.

The previous prime is 123938623. The next prime is 123938681. The reversal of 123938669 is 966839321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95316169 + 28622500 = 9763^2 + 5350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123938669 is a prime.

It is a super-2 number, since 2×123938669² = 30721587346983122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123938609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61969334 + 61969335.

It is an arithmetic number, because the mean of its divisors is an integer number (61969335).

Almost surely, 2^123938669 is an apocalyptic number.

It is an amenable number.

123938669 is a deficient number, since it is larger than the sum of its proper divisors (1).

123938669 is an equidigital number, since it uses as much as digits as its factorization.

123938669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 123938669 is about 11132.7745418651. The cubic root of 123938669 is about 498.5808679391.

The spelling of 123938669 in words is "one hundred twenty-three million, nine hundred thirty-eight thousand, six hundred sixty-nine".