523707993 has 6 divisors (see below), whose sum is σ = 756467114. Its totient is φ = 349138656.

The previous prime is 523707991. The next prime is 523708021. The reversal of 523707993 is 399707325.

It can be written as a sum of positive squares in only one way, i.e., 317124864 + 206583129 = 17808^2 + 14373^2 .

It is not a de Polignac number, because 523707993 - 2¹ = 523707991 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (523707991) 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 in 5 ways as a sum of consecutive naturals, for example, 29094880 + ... + 29094897.

Almost surely, 2^523707993 is an apocalyptic number.

It is an amenable number.

523707993 is a deficient number, since it is larger than the sum of its proper divisors (232759121).

523707993 is a wasteful number, since it uses less digits than its factorization.

523707993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58189783 (or 58189780 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 45.

The square root of 523707993 is about 22884.6672031734. The cubic root of 523707993 is about 806.0520139781.

The spelling of 523707993 in words is "five hundred twenty-three million, seven hundred seven thousand, nine hundred ninety-three".