36699581 has 2 divisors, whose sum is σ = 36699582. Its totient is φ = 36699580.

The previous prime is 36699577. The next prime is 36699623. The reversal of 36699581 is 18599663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24344356 + 12355225 = 4934^2 + 3515^2 .

It is a cyclic number.

It is not a de Polignac number, because 36699581 - 2² = 36699577 is a prime.

It is a super-2 number, since 2×36699581² = 2693718491151122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36699541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18349790 + 18349791.

It is an arithmetic number, because the mean of its divisors is an integer number (18349791).

Almost surely, 2^36699581 is an apocalyptic number.

It is an amenable number.

36699581 is a deficient number, since it is larger than the sum of its proper divisors (1).

36699581 is an equidigital number, since it uses as much as digits as its factorization.

36699581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 47.

The square root of 36699581 is about 6058.0179101749. The cubic root of 36699581 is about 332.3178748960.

The spelling of 36699581 in words is "thirty-six million, six hundred ninety-nine thousand, five hundred eighty-one".