523640041 has 4 divisors (see below), whose sum is σ = 531455632. Its totient is φ = 515824452.

The previous prime is 523640027. The next prime is 523640081. The reversal of 523640041 is 140046325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 523640041 - 2⁵ = 523640009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 523639988 and 523640015.

It is not an unprimeable number, because it can be changed into a prime (523640081) 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 3 ways as a sum of consecutive naturals, for example, 3907695 + ... + 3907828.

It is an arithmetic number, because the mean of its divisors is an integer number (132863908).

Almost surely, 2^523640041 is an apocalyptic number.

It is an amenable number.

523640041 is a deficient number, since it is larger than the sum of its proper divisors (7815591).

523640041 is an equidigital number, since it uses as much as digits as its factorization.

523640041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7815590.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 523640041 is about 22883.1824928265. The cubic root of 523640041 is about 806.0171502651.

Adding to 523640041 its reverse (140046325), we get a palindrome (663686366).

The spelling of 523640041 in words is "five hundred twenty-three million, six hundred forty thousand, forty-one".