36349981 has 2 divisors, whose sum is σ = 36349982. Its totient is φ = 36349980.

The previous prime is 36349931. The next prime is 36349987. The reversal of 36349981 is 18994363.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28836900 + 7513081 = 5370^2 + 2741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36349981 is a prime.

It is a super-2 number, since 2×36349981² = 2642642237400722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36349987) 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, 18174990 + 18174991.

It is an arithmetic number, because the mean of its divisors is an integer number (18174991).

Almost surely, 2^36349981 is an apocalyptic number.

It is an amenable number.

36349981 is a deficient number, since it is larger than the sum of its proper divisors (1).

36349981 is an equidigital number, since it uses as much as digits as its factorization.

36349981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 36349981 is about 6029.0945423007. The cubic root of 36349981 is about 331.2592869830.

The spelling of 36349981 in words is "thirty-six million, three hundred forty-nine thousand, nine hundred eighty-one".