36788581 has 2 divisors, whose sum is σ = 36788582. Its totient is φ = 36788580.

The previous prime is 36788573. The next prime is 36788627. The reversal of 36788581 is 18588763.

It is an a-pointer prime, because the next prime (36788627) can be obtained adding 36788581 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36784225 + 4356 = 6065^2 + 66^2 .

It is a cyclic number.

It is not a de Polignac number, because 36788581 - 2³ = 36788573 is a prime.

It is a super-2 number, since 2×36788581² = 2706799383987122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36788681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18394290 + 18394291.

It is an arithmetic number, because the mean of its divisors is an integer number (18394291).

Almost surely, 2^36788581 is an apocalyptic number.

It is an amenable number.

36788581 is a deficient number, since it is larger than the sum of its proper divisors (1).

36788581 is an equidigital number, since it uses as much as digits as its factorization.

36788581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 46.

The square root of 36788581 is about 6065.3590990147. The cubic root of 36788581 is about 332.5862922618.

The spelling of 36788581 in words is "thirty-six million, seven hundred eighty-eight thousand, five hundred eighty-one".