523758649 has 2 divisors, whose sum is σ = 523758650. Its totient is φ = 523758648.

The previous prime is 523758611. The next prime is 523758659. The reversal of 523758649 is 946857325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503688249 + 20070400 = 22443^2 + 4480^2 .

It is a cyclic number.

It is not a de Polignac number, because 523758649 - 2¹¹ = 523756601 is a prime.

It is not a weakly prime, because it can be changed into another prime (523758659) 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, 261879324 + 261879325.

It is an arithmetic number, because the mean of its divisors is an integer number (261879325).

Almost surely, 2^523758649 is an apocalyptic number.

It is an amenable number.

523758649 is a deficient number, since it is larger than the sum of its proper divisors (1).

523758649 is an equidigital number, since it uses as much as digits as its factorization.

523758649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 49.

The square root of 523758649 is about 22885.7739436533. The cubic root of 523758649 is about 806.0780017773.

The spelling of 523758649 in words is "five hundred twenty-three million, seven hundred fifty-eight thousand, six hundred forty-nine".