36781189 has 2 divisors, whose sum is σ = 36781190. Its totient is φ = 36781188.

The previous prime is 36781187. The next prime is 36781237. The reversal of 36781189 is 98118763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19492225 + 17288964 = 4415^2 + 4158^2 .

It is an emirp because it is prime and its reverse (98118763) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36781189 - 2¹ = 36781187 is a prime.

Together with 36781187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36781181) 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, 18390594 + 18390595.

It is an arithmetic number, because the mean of its divisors is an integer number (18390595).

Almost surely, 2^36781189 is an apocalyptic number.

It is an amenable number.

36781189 is a deficient number, since it is larger than the sum of its proper divisors (1).

36781189 is an equidigital number, since it uses as much as digits as its factorization.

36781189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 36781189 is about 6064.7497062946. The cubic root of 36781189 is about 332.5640150363.

The spelling of 36781189 in words is "thirty-six million, seven hundred eighty-one thousand, one hundred eighty-nine".