3964637 has 4 divisors (see below), whose sum is σ = 3968796. Its totient is φ = 3960480.

The previous prime is 3964633. The next prime is 3964651. The reversal of 3964637 is 7364693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7364693 = 7 ⋅1052099.

It can be written as a sum of positive squares in 2 ways, for example, as 674041 + 3290596 = 821^2 + 1814^2 .

It is a cyclic number.

It is not a de Polignac number, because 3964637 - 2² = 3964633 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 3964637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3964633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143 + ... + 2819.

It is an arithmetic number, because the mean of its divisors is an integer number (992199).

Almost surely, 2^3964637 is an apocalyptic number.

It is an amenable number.

3964637 is a deficient number, since it is larger than the sum of its proper divisors (4159).

3964637 is a wasteful number, since it uses less digits than its factorization.

3964637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158.

The product of its digits is 81648, while the sum is 38.

The square root of 3964637 is about 1991.1396234318. The cubic root of 3964637 is about 158.2709259747.

The spelling of 3964637 in words is "three million, nine hundred sixty-four thousand, six hundred thirty-seven".