1361836887 has 4 divisors (see below), whose sum is σ = 1815782520. Its totient is φ = 907891256.

The previous prime is 1361836849. The next prime is 1361836919. The reversal of 1361836887 is 7886381631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361836887 - 2¹⁴ = 1361820503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361836807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226972812 + ... + 226972817.

It is an arithmetic number, because the mean of its divisors is an integer number (453945630).

Almost surely, 2^1361836887 is an apocalyptic number.

1361836887 is a deficient number, since it is larger than the sum of its proper divisors (453945633).

1361836887 is an equidigital number, since it uses as much as digits as its factorization.

1361836887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453945632.

The product of its digits is 1161216, while the sum is 51.

The square root of 1361836887 is about 36903.0742215334. The cubic root of 1361836887 is about 1108.4302370559.

It can be divided in two parts, 13618 and 36887, that added together give a palindrome (50505).

The spelling of 1361836887 in words is "one billion, three hundred sixty-one million, eight hundred thirty-six thousand, eight hundred eighty-seven".