523690043 has 2 divisors, whose sum is σ = 523690044. Its totient is φ = 523690042.

The previous prime is 523690039. The next prime is 523690051. The reversal of 523690043 is 340096325.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 523690043 - 2² = 523690039 is a prime.

It is a super-2 number, since 2×523690043² = 548502522274683698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 523689991 and 523690009.

It is not a weakly prime, because it can be changed into another prime (523690073) 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, 261845021 + 261845022.

It is an arithmetic number, because the mean of its divisors is an integer number (261845022).

Almost surely, 2^523690043 is an apocalyptic number.

523690043 is a deficient number, since it is larger than the sum of its proper divisors (1).

523690043 is an equidigital number, since it uses as much as digits as its factorization.

523690043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 523690043 is about 22884.2750158269. The cubic root of 523690043 is about 806.0428047756.

The spelling of 523690043 in words is "five hundred twenty-three million, six hundred ninety thousand, forty-three".