40505671 has 2 divisors, whose sum is σ = 40505672. Its totient is φ = 40505670.

The previous prime is 40505659. The next prime is 40505719. The reversal of 40505671 is 17650504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40505671 - 2¹⁷ = 40374599 is a prime.

It is equal to p_2462581 and since 40505671 and 2462581 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40505651) 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, 20252835 + 20252836.

It is an arithmetic number, because the mean of its divisors is an integer number (20252836).

Almost surely, 2^40505671 is an apocalyptic number.

40505671 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505671 is an equidigital number, since it uses as much as digits as its factorization.

40505671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 40505671 is about 6364.4065709224. The cubic root of 40505671 is about 343.4303008438.

The spelling of 40505671 in words is "forty million, five hundred five thousand, six hundred seventy-one".