36167981 has 4 divisors (see below), whose sum is σ = 37145532. Its totient is φ = 35190432.

The previous prime is 36167953. The next prime is 36167987. The reversal of 36167981 is 18976163.

36167981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34703881 + 1464100 = 5891^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 36167981 - 2¹⁰ = 36166957 is a prime.

It is a super-2 number, since 2×36167981² = 2616245699232722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36167987) 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 in 3 ways as a sum of consecutive naturals, for example, 488720 + ... + 488793.

It is an arithmetic number, because the mean of its divisors is an integer number (9286383).

Almost surely, 2^36167981 is an apocalyptic number.

It is an amenable number.

36167981 is a deficient number, since it is larger than the sum of its proper divisors (977551).

36167981 is an equidigital number, since it uses as much as digits as its factorization.

36167981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977550.

The product of its digits is 54432, while the sum is 41.

The square root of 36167981 is about 6013.9821250150. The cubic root of 36167981 is about 330.7055031878.

The spelling of 36167981 in words is "thirty-six million, one hundred sixty-seven thousand, nine hundred eighty-one".