40344523 has 2 divisors, whose sum is σ = 40344524. Its totient is φ = 40344522.

The previous prime is 40344517. The next prime is 40344559. The reversal of 40344523 is 32544304.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40344523 is a prime.

It is not a weakly prime, because it can be changed into another prime (40344593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20172261 + 20172262.

It is an arithmetic number, because the mean of its divisors is an integer number (20172262).

Almost surely, 2^40344523 is an apocalyptic number.

40344523 is a deficient number, since it is larger than the sum of its proper divisors (1).

40344523 is an equidigital number, since it uses as much as digits as its factorization.

40344523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 40344523 is about 6351.7338577746. The cubic root of 40344523 is about 342.9742604932.

Adding to 40344523 its reverse (32544304), we get a palindrome (72888827).

The spelling of 40344523 in words is "forty million, three hundred forty-four thousand, five hundred twenty-three".