36845981 has 4 divisors (see below), whose sum is σ = 37111200. Its totient is φ = 36580764.

The previous prime is 36845957. The next prime is 36845993. The reversal of 36845981 is 18954863.

36845981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18954863 = 181 ⋅104723.

It is a cyclic number.

It is not a de Polignac number, because 36845981 - 2²² = 32651677 is a prime.

It is a super-2 number, since 2×36845981² = 2715252631704722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36845951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132401 + ... + 132678.

It is an arithmetic number, because the mean of its divisors is an integer number (9277800).

Almost surely, 2^36845981 is an apocalyptic number.

It is an amenable number.

36845981 is a deficient number, since it is larger than the sum of its proper divisors (265219).

36845981 is a wasteful number, since it uses less digits than its factorization.

36845981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265218.

The product of its digits is 207360, while the sum is 44.

The square root of 36845981 is about 6070.0890438279. The cubic root of 36845981 is about 332.7591768229.

The spelling of 36845981 in words is "thirty-six million, eight hundred forty-five thousand, nine hundred eighty-one".