40000523 has 2 divisors, whose sum is σ = 40000524. Its totient is φ = 40000522.

The previous prime is 40000517. The next prime is 40000537. The reversal of 40000523 is 32500004.

It is an a-pointer prime, because the next prime (40000537) can be obtained adding 40000523 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40000523 - 2¹⁰ = 39999499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40000498 and 40000507.

It is not a weakly prime, because it can be changed into another prime (40000573) 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, 20000261 + 20000262.

It is an arithmetic number, because the mean of its divisors is an integer number (20000262).

Almost surely, 2^40000523 is an apocalyptic number.

40000523 is a deficient number, since it is larger than the sum of its proper divisors (1).

40000523 is an equidigital number, since it uses as much as digits as its factorization.

40000523 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 40000523 is about 6324.5966669820. The cubic root of 40000523 is about 341.9966798579.

Adding to 40000523 its reverse (32500004), we get a palindrome (72500527).

The spelling of 40000523 in words is "forty million, five hundred twenty-three", and thus it is an aban number.