123891233 has 2 divisors, whose sum is σ = 123891234. Its totient is φ = 123891232.

The previous prime is 123891227. The next prime is 123891239. The reversal of 123891233 is 332198321.

It is a balanced prime because it is at equal distance from previous prime (123891227) and next prime (123891239).

It can be written as a sum of positive squares in only one way, i.e., 112105744 + 11785489 = 10588^2 + 3433^2 .

It is a cyclic number.

It is not a de Polignac number, because 123891233 - 2¹⁰ = 123890209 is a prime.

It is a super-2 number, since 2×123891233² = 30698075228520578, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123891233.

It is not a weakly prime, because it can be changed into another prime (123891239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61945616 + 61945617.

It is an arithmetic number, because the mean of its divisors is an integer number (61945617).

Almost surely, 2^123891233 is an apocalyptic number.

It is an amenable number.

123891233 is a deficient number, since it is larger than the sum of its proper divisors (1).

123891233 is an equidigital number, since it uses as much as digits as its factorization.

123891233 is an odious number, because the sum of its binary digits is odd.

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

The square root of 123891233 is about 11130.6438717623. The cubic root of 123891233 is about 498.5172512589.

The spelling of 123891233 in words is "one hundred twenty-three million, eight hundred ninety-one thousand, two hundred thirty-three".