40540517 has 2 divisors, whose sum is σ = 40540518. Its totient is φ = 40540516.

The previous prime is 40540499. The next prime is 40540519. The reversal of 40540517 is 71504504.

40540517 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 can be written as a sum of positive squares in only one way, i.e., 31292836 + 9247681 = 5594^2 + 3041^2 .

It is a cyclic number.

It is not a de Polignac number, because 40540517 - 2⁶ = 40540453 is a prime.

Together with 40540519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40540519) 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, 20270258 + 20270259.

It is an arithmetic number, because the mean of its divisors is an integer number (20270259).

Almost surely, 2^40540517 is an apocalyptic number.

It is an amenable number.

40540517 is a deficient number, since it is larger than the sum of its proper divisors (1).

40540517 is an equidigital number, since it uses as much as digits as its factorization.

40540517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 40540517 is about 6367.1435510753. The cubic root of 40540517 is about 343.5287540720.

The spelling of 40540517 in words is "forty million, five hundred forty thousand, five hundred seventeen".