16363861 has 2 divisors, whose sum is σ = 16363862. Its totient is φ = 16363860.

The previous prime is 16363847. The next prime is 16363873. The reversal of 16363861 is 16836361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14938225 + 1425636 = 3865^2 + 1194^2 .

It is an emirp because it is prime and its reverse (16836361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16363861 - 2¹⁵ = 16331093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16361861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8181930 + 8181931.

It is an arithmetic number, because the mean of its divisors is an integer number (8181931).

Almost surely, 2^16363861 is an apocalyptic number.

It is an amenable number.

16363861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16363861 is an equidigital number, since it uses as much as digits as its factorization.

16363861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 16363861 is about 4045.2269404818. The cubic root of 16363861 is about 253.8800609672.

The spelling of 16363861 in words is "sixteen million, three hundred sixty-three thousand, eight hundred sixty-one".