523604989 has 2 divisors, whose sum is σ = 523604990. Its totient is φ = 523604988.

The previous prime is 523604941. The next prime is 523604993. The reversal of 523604989 is 989406325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480924900 + 42680089 = 21930^2 + 6533^2 .

It is a cyclic number.

It is not a de Polignac number, because 523604989 - 2¹³ = 523596797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523604909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261802494 + 261802495.

It is an arithmetic number, because the mean of its divisors is an integer number (261802495).

Almost surely, 2^523604989 is an apocalyptic number.

It is an amenable number.

523604989 is a deficient number, since it is larger than the sum of its proper divisors (1).

523604989 is an equidigital number, since it uses as much as digits as its factorization.

523604989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 523604989 is about 22882.4165900370. The cubic root of 523604989 is about 805.9991651727. Note that the first 3 decimals are identical.

The spelling of 523604989 in words is "five hundred twenty-three million, six hundred four thousand, nine hundred eighty-nine".