40216717 has 2 divisors, whose sum is σ = 40216718. Its totient is φ = 40216716.

The previous prime is 40216681. The next prime is 40216721. The reversal of 40216717 is 71761204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32959081 + 7257636 = 5741^2 + 2694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40216717 is a prime.

It is a zygodrome in base 7.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40216727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20108358 + 20108359.

It is an arithmetic number, because the mean of its divisors is an integer number (20108359).

Almost surely, 2^40216717 is an apocalyptic number.

It is an amenable number.

40216717 is a deficient number, since it is larger than the sum of its proper divisors (1).

40216717 is an equidigital number, since it uses as much as digits as its factorization.

40216717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 40216717 is about 6341.6651598772. The cubic root of 40216717 is about 342.6117120098.

The spelling of 40216717 in words is "forty million, two hundred sixteen thousand, seven hundred seventeen".