523303393 has 2 divisors, whose sum is σ = 523303394. Its totient is φ = 523303392.

The previous prime is 523303369. The next prime is 523303423. The reversal of 523303393 is 393303325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 508186849 + 15116544 = 22543^2 + 3888^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523303393 is a prime.

It is a super-2 number, since 2×523303393² = 547692882250624898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (523303093) 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 as a sum of consecutive naturals, namely, 261651696 + 261651697.

It is an arithmetic number, because the mean of its divisors is an integer number (261651697).

Almost surely, 2^523303393 is an apocalyptic number.

It is an amenable number.

523303393 is a deficient number, since it is larger than the sum of its proper divisors (1).

523303393 is an equidigital number, since it uses as much as digits as its factorization.

523303393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870, while the sum is 31.

The square root of 523303393 is about 22875.8255151590. The cubic root of 523303393 is about 805.8443838542.

The spelling of 523303393 in words is "five hundred twenty-three million, three hundred three thousand, three hundred ninety-three".