123764189 has 2 divisors, whose sum is σ = 123764190. Its totient is φ = 123764188.

The previous prime is 123764177. The next prime is 123764213. The reversal of 123764189 is 981467321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62141689 + 61622500 = 7883^2 + 7850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123764189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123764129) 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, 61882094 + 61882095.

It is an arithmetic number, because the mean of its divisors is an integer number (61882095).

Almost surely, 2^123764189 is an apocalyptic number.

It is an amenable number.

123764189 is a deficient number, since it is larger than the sum of its proper divisors (1).

123764189 is an equidigital number, since it uses as much as digits as its factorization.

123764189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 123764189 is about 11124.9354604870. The cubic root of 123764189 is about 498.3467918300.

The spelling of 123764189 in words is "one hundred twenty-three million, seven hundred sixty-four thousand, one hundred eighty-nine".