523123189 has 2 divisors, whose sum is σ = 523123190. Its totient is φ = 523123188.

The previous prime is 523123169. The next prime is 523123213. The reversal of 523123189 is 981321325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410062500 + 113060689 = 20250^2 + 10633^2 .

It is a cyclic number.

It is not a de Polignac number, because 523123189 - 2⁷ = 523123061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523123169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261561594 + 261561595.

It is an arithmetic number, because the mean of its divisors is an integer number (261561595).

Almost surely, 2^523123189 is an apocalyptic number.

It is an amenable number.

523123189 is a deficient number, since it is larger than the sum of its proper divisors (1).

523123189 is an equidigital number, since it uses as much as digits as its factorization.

523123189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 523123189 is about 22871.8864329115. The cubic root of 523123189 is about 805.7518734321.

The spelling of 523123189 in words is "five hundred twenty-three million, one hundred twenty-three thousand, one hundred eighty-nine".