3936649 has 4 divisors (see below), whose sum is σ = 3986560. Its totient is φ = 3886740.

The previous prime is 3936643. The next prime is 3936683. The reversal of 3936649 is 9466393.

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.

It is a cyclic number.

It is not a de Polignac number, because 3936649 - 2³ = 3936641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3936641) 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, 24837 + ... + 24994.

It is an arithmetic number, because the mean of its divisors is an integer number (996640).

Almost surely, 2^3936649 is an apocalyptic number.

It is an amenable number.

3936649 is a deficient number, since it is larger than the sum of its proper divisors (49911).

3936649 is an equidigital number, since it uses as much as digits as its factorization.

3936649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49910.

The product of its digits is 104976, while the sum is 40.

The square root of 3936649 is about 1984.0990398667. The cubic root of 3936649 is about 157.8976129905.

The spelling of 3936649 in words is "three million, nine hundred thirty-six thousand, six hundred forty-nine".