16387717 has 2 divisors, whose sum is σ = 16387718. Its totient is φ = 16387716.

The previous prime is 16387703. The next prime is 16387727. The reversal of 16387717 is 71778361.

16387717 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., 10751841 + 5635876 = 3279^2 + 2374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16387717 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16387717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16387727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8193858 + 8193859.

It is an arithmetic number, because the mean of its divisors is an integer number (8193859).

Almost surely, 2^16387717 is an apocalyptic number.

It is an amenable number.

16387717 is a deficient number, since it is larger than the sum of its proper divisors (1).

16387717 is an equidigital number, since it uses as much as digits as its factorization.

16387717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 40.

The square root of 16387717 is about 4048.1745268701. The cubic root of 16387717 is about 254.0033737953.

The spelling of 16387717 in words is "sixteen million, three hundred eighty-seven thousand, seven hundred seventeen".