36039581 has 2 divisors, whose sum is σ = 36039582. Its totient is φ = 36039580.

The previous prime is 36039559. The next prime is 36039607. The reversal of 36039581 is 18593063.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27825625 + 8213956 = 5275^2 + 2866^2 .

It is an emirp because it is prime and its reverse (18593063) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36039581 is a prime.

It is a super-2 number, since 2×36039581² = 2597702797311122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36039511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18019790 + 18019791.

It is an arithmetic number, because the mean of its divisors is an integer number (18019791).

Almost surely, 2^36039581 is an apocalyptic number.

It is an amenable number.

36039581 is a deficient number, since it is larger than the sum of its proper divisors (1).

36039581 is an equidigital number, since it uses as much as digits as its factorization.

36039581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 36039581 is about 6003.2975105354. The cubic root of 36039581 is about 330.3136931429.

The spelling of 36039581 in words is "thirty-six million, thirty-nine thousand, five hundred eighty-one".