40505719 has 2 divisors, whose sum is σ = 40505720. Its totient is φ = 40505718.

The previous prime is 40505671. The next prime is 40505723. The reversal of 40505719 is 91750504.

40505719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40505719 is a prime.

It is a super-2 number, since 2×40505719² = 3281426543413922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40505789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20252859 + 20252860.

It is an arithmetic number, because the mean of its divisors is an integer number (20252860).

Almost surely, 2^40505719 is an apocalyptic number.

40505719 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505719 is an equidigital number, since it uses as much as digits as its factorization.

40505719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 40505719 is about 6364.4103418934. The cubic root of 40505719 is about 343.4304365009.

The spelling of 40505719 in words is "forty million, five hundred five thousand, seven hundred nineteen".