36038581 has 2 divisors, whose sum is σ = 36038582. Its totient is φ = 36038580.

The previous prime is 36038579. The next prime is 36038591. The reversal of 36038581 is 18583063.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35343025 + 695556 = 5945^2 + 834^2 .

It is a cyclic number.

It is not a de Polignac number, because 36038581 - 2¹ = 36038579 is a prime.

It is a super-2 number, since 2×36038581² = 2597558640987122, which contains 22 as substring.

Together with 36038579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36038501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18019290 + 18019291.

It is an arithmetic number, because the mean of its divisors is an integer number (18019291).

Almost surely, 2^36038581 is an apocalyptic number.

It is an amenable number.

36038581 is a deficient number, since it is larger than the sum of its proper divisors (1).

36038581 is an equidigital number, since it uses as much as digits as its factorization.

36038581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 36038581 is about 6003.2142223979. The cubic root of 36038581 is about 330.3106380135.

The spelling of 36038581 in words is "thirty-six million, thirty-eight thousand, five hundred eighty-one".