36981817 has 8 divisors (see below), whose sum is σ = 39220200. Its totient is φ = 34750464.

The previous prime is 36981803. The next prime is 36981827. The reversal of 36981817 is 71818963.

It can be written as a sum of positive squares in 4 ways, for example, as 7268416 + 29713401 = 2696^2 + 5451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 36981817 - 2⁷ = 36981689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36981827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12409 + ... + 15097.

It is an arithmetic number, because the mean of its divisors is an integer number (4902525).

Almost surely, 2^36981817 is an apocalyptic number.

It is an amenable number.

36981817 is a deficient number, since it is larger than the sum of its proper divisors (2238383).

36981817 is a wasteful number, since it uses less digits than its factorization.

36981817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515.

The product of its digits is 72576, while the sum is 43.

The square root of 36981817 is about 6081.2677132322. The cubic root of 36981817 is about 333.1675908241.

The spelling of 36981817 in words is "thirty-six million, nine hundred eighty-one thousand, eight hundred seventeen".