16380517 has 2 divisors, whose sum is σ = 16380518. Its totient is φ = 16380516.

The previous prime is 16380509. The next prime is 16380521. The reversal of 16380517 is 71508361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12574116 + 3806401 = 3546^2 + 1951^2 .

It is an emirp because it is prime and its reverse (71508361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16380517 - 2³ = 16380509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16380557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8190258 + 8190259.

It is an arithmetic number, because the mean of its divisors is an integer number (8190259).

Almost surely, 2^16380517 is an apocalyptic number.

It is an amenable number.

16380517 is a deficient number, since it is larger than the sum of its proper divisors (1).

16380517 is an equidigital number, since it uses as much as digits as its factorization.

16380517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 16380517 is about 4047.2851394484. The cubic root of 16380517 is about 253.9661692599.

Adding to 16380517 its reverse (71508361), we get a palindrome (87888878).

The spelling of 16380517 in words is "sixteen million, three hundred eighty thousand, five hundred seventeen".