4000523 has 2 divisors, whose sum is σ = 4000524. Its totient is φ = 4000522.

The previous prime is 4000511. The next prime is 4000541. The reversal of 4000523 is 3250004.

4000523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4000523 - 2⁸ = 4000267 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 4000498 and 4000507.

It is not a weakly prime, because it can be changed into another prime (4000543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000261 + 2000262.

It is an arithmetic number, because the mean of its divisors is an integer number (2000262).

Almost surely, 2^4000523 is an apocalyptic number.

4000523 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000523 is an equidigital number, since it uses as much as digits as its factorization.

4000523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 4000523 is about 2000.1307457264. The cubic root of 4000523 is about 158.7470233182.

Adding to 4000523 its reverse (3250004), we get a palindrome (7250527).

The spelling of 4000523 in words is "four million, five hundred twenty-three", and thus it is an aban number.