40504423 has 2 divisors, whose sum is σ = 40504424. Its totient is φ = 40504422.

The previous prime is 40504417. The next prime is 40504517. The reversal of 40504423 is 32440504.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40504423 is a prime.

It is equal to p_2462512 and since 40504423 and 2462512 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 40504394 and 40504403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40504223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20252211 + 20252212.

It is an arithmetic number, because the mean of its divisors is an integer number (20252212).

Almost surely, 2^40504423 is an apocalyptic number.

40504423 is a deficient number, since it is larger than the sum of its proper divisors (1).

40504423 is an equidigital number, since it uses as much as digits as its factorization.

40504423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 40504423 is about 6364.3085248910. The cubic root of 40504423 is about 343.4267737210.

Adding to 40504423 its reverse (32440504), we get a palindrome (72944927).

The spelling of 40504423 in words is "forty million, five hundred four thousand, four hundred twenty-three".