36389681 has 2 divisors, whose sum is σ = 36389682. Its totient is φ = 36389680.

The previous prime is 36389669. The next prime is 36389687. The reversal of 36389681 is 18698363.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35046400 + 1343281 = 5920^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 36389681 - 2¹⁴ = 36373297 is a prime.

It is a super-2 number, since 2×36389681² = 2648417766563522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36389687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18194840 + 18194841.

It is an arithmetic number, because the mean of its divisors is an integer number (18194841).

Almost surely, 2^36389681 is an apocalyptic number.

It is an amenable number.

36389681 is a deficient number, since it is larger than the sum of its proper divisors (1).

36389681 is an equidigital number, since it uses as much as digits as its factorization.

36389681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The square root of 36389681 is about 6032.3860121846. The cubic root of 36389681 is about 331.3798391683.

The spelling of 36389681 in words is "thirty-six million, three hundred eighty-nine thousand, six hundred eighty-one".