36643949 has 4 divisors (see below), whose sum is σ = 37634364. Its totient is φ = 35653536.

The previous prime is 36643939. The next prime is 36643961. The reversal of 36643949 is 94934663.

36643949 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.

It can be written as a sum of positive squares in 2 ways, for example, as 26081449 + 10562500 = 5107^2 + 3250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36643949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36643909) 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, 495152 + ... + 495225.

It is an arithmetic number, because the mean of its divisors is an integer number (9408591).

Almost surely, 2^36643949 is an apocalyptic number.

It is an amenable number.

36643949 is a deficient number, since it is larger than the sum of its proper divisors (990415).

36643949 is an equidigital number, since it uses as much as digits as its factorization.

36643949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990414.

The product of its digits is 419904, while the sum is 44.

The square root of 36643949 is about 6053.4245679615. The cubic root of 36643949 is about 332.1498724559.

The spelling of 36643949 in words is "thirty-six million, six hundred forty-three thousand, nine hundred forty-nine".