123391183 has 2 divisors, whose sum is σ = 123391184. Its totient is φ = 123391182.

The previous prime is 123391171. The next prime is 123391199. The reversal of 123391183 is 381193321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123391183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123391133) 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, 61695591 + 61695592.

It is an arithmetic number, because the mean of its divisors is an integer number (61695592).

Almost surely, 2^123391183 is an apocalyptic number.

123391183 is a deficient number, since it is larger than the sum of its proper divisors (1).

123391183 is an equidigital number, since it uses as much as digits as its factorization.

123391183 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 123391183 is about 11108.1583982225. The cubic root of 123391183 is about 497.8456414773.

It can be divided in two parts, 1233 and 91183, that added together give a square (92416 = 304²).

The spelling of 123391183 in words is "one hundred twenty-three million, three hundred ninety-one thousand, one hundred eighty-three".