16361861 has 2 divisors, whose sum is σ = 16361862. Its totient is φ = 16361860.

The previous prime is 16361843. The next prime is 16361867. The reversal of 16361861 is 16816361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15880225 + 481636 = 3985^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 16361861 - 2¹⁰ = 16360837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16361867) 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, 8180930 + 8180931.

It is an arithmetic number, because the mean of its divisors is an integer number (8180931).

Almost surely, 2^16361861 is an apocalyptic number.

It is an amenable number.

16361861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16361861 is an equidigital number, since it uses as much as digits as its factorization.

16361861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 16361861 is about 4044.9797280085. The cubic root of 16361861 is about 253.8697174260.

The spelling of 16361861 in words is "sixteen million, three hundred sixty-one thousand, eight hundred sixty-one".