36791681 has 2 divisors, whose sum is σ = 36791682. Its totient is φ = 36791680.

The previous prime is 36791669. The next prime is 36791683. The reversal of 36791681 is 18619763.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21307456 + 15484225 = 4616^2 + 3935^2 .

It is an emirp because it is prime and its reverse (18619763) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36791681 is a prime.

It is a super-2 number, since 2×36791681² = 2707255581611522, which contains 22 as substring.

Together with 36791683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36791683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18395840 + 18395841.

It is an arithmetic number, because the mean of its divisors is an integer number (18395841).

Almost surely, 2^36791681 is an apocalyptic number.

It is an amenable number.

36791681 is a deficient number, since it is larger than the sum of its proper divisors (1).

36791681 is an equidigital number, since it uses as much as digits as its factorization.

36791681 is an evil number, because the sum of its binary digits is even.

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

The square root of 36791681 is about 6065.6146432163. The cubic root of 36791681 is about 332.5956338249.

The spelling of 36791681 in words is "thirty-six million, seven hundred ninety-one thousand, six hundred eighty-one".