3639737 has 4 divisors (see below), whose sum is σ = 3675876. Its totient is φ = 3603600.

The previous prime is 3639733. The next prime is 3639739. The reversal of 3639737 is 7379363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7379363 = 101 ⋅73063.

It can be written as a sum of positive squares in 2 ways, for example, as 2042041 + 1597696 = 1429^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 3639737 - 2² = 3639733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3639737.

It is not an unprimeable number, because it can be changed into a prime (3639733) 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, 17918 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (918969).

Almost surely, 2^3639737 is an apocalyptic number.

It is an amenable number.

3639737 is a deficient number, since it is larger than the sum of its proper divisors (36139).

3639737 is a wasteful number, since it uses less digits than its factorization.

3639737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36138.

The product of its digits is 71442, while the sum is 38.

The square root of 3639737 is about 1907.8094768608. The cubic root of 3639737 is about 153.8237287122.

The spelling of 3639737 in words is "three million, six hundred thirty-nine thousand, seven hundred thirty-seven".