361985863 has 2 divisors, whose sum is σ = 361985864. Its totient is φ = 361985862.

The previous prime is 361985797. The next prime is 361985909. The reversal of 361985863 is 368589163.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-361985863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (361985563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180992931 + 180992932.

It is an arithmetic number, because the mean of its divisors is an integer number (180992932).

Almost surely, 2^361985863 is an apocalyptic number.

361985863 is a deficient number, since it is larger than the sum of its proper divisors (1).

361985863 is an equidigital number, since it uses as much as digits as its factorization.

361985863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 361985863 is about 19025.9260747013. The cubic root of 361985863 is about 712.6843191138.

The spelling of 361985863 in words is "three hundred sixty-one million, nine hundred eighty-five thousand, eight hundred sixty-three".