3937661 has 8 divisors (see below), whose sum is σ = 4846464. Its totient is φ = 3115440.

The previous prime is 3937643. The next prime is 3937673. The reversal of 3937661 is 1667393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3937661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3937621) 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 7 ways as a sum of consecutive naturals, for example, 21545 + ... + 21726.

It is an arithmetic number, because the mean of its divisors is an integer number (605808).

Almost surely, 2^3937661 is an apocalyptic number.

It is an amenable number.

3937661 is a deficient number, since it is larger than the sum of its proper divisors (908803).

3937661 is a wasteful number, since it uses less digits than its factorization.

3937661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43291.

The product of its digits is 20412, while the sum is 35.

The square root of 3937661 is about 1984.3540510705. The cubic root of 3937661 is about 157.9111421531.

The spelling of 3937661 in words is "three million, nine hundred thirty-seven thousand, six hundred sixty-one".