36969181 has 2 divisors, whose sum is σ = 36969182. Its totient is φ = 36969180.

The previous prime is 36969173. The next prime is 36969187. The reversal of 36969181 is 18196963.

36969181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34692100 + 2277081 = 5890^2 + 1509^2 .

It is an emirp because it is prime and its reverse (18196963) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36969181 - 2³ = 36969173 is a prime.

It is a super-2 number, since 2×36969181² = 2733440687621522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36969187) 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, 18484590 + 18484591.

It is an arithmetic number, because the mean of its divisors is an integer number (18484591).

Almost surely, 2^36969181 is an apocalyptic number.

It is an amenable number.

36969181 is a deficient number, since it is larger than the sum of its proper divisors (1).

36969181 is an equidigital number, since it uses as much as digits as its factorization.

36969181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 36969181 is about 6080.2286963567. The cubic root of 36969181 is about 333.1296407756.

The spelling of 36969181 in words is "thirty-six million, nine hundred sixty-nine thousand, one hundred eighty-one".