523563749 has 2 divisors, whose sum is σ = 523563750. Its totient is φ = 523563748.

The previous prime is 523563713. The next prime is 523563827. The reversal of 523563749 is 947365325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384748225 + 138815524 = 19615^2 + 11782^2 .

It is a cyclic number.

It is not a de Polignac number, because 523563749 - 2⁸ = 523563493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523563049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261781874 + 261781875.

It is an arithmetic number, because the mean of its divisors is an integer number (261781875).

Almost surely, 2^523563749 is an apocalyptic number.

It is an amenable number.

523563749 is a deficient number, since it is larger than the sum of its proper divisors (1).

523563749 is an equidigital number, since it uses as much as digits as its factorization.

523563749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 44.

The square root of 523563749 is about 22881.5154436938. The cubic root of 523563749 is about 805.9780040054.

The spelling of 523563749 in words is "five hundred twenty-three million, five hundred sixty-three thousand, seven hundred forty-nine".