3891941 has 6 divisors (see below), whose sum is σ = 4107942. Its totient is φ = 3686760.

The previous prime is 3891917. The next prime is 3891971. The reversal of 3891941 is 1491983.

It can be written as a sum of positive squares in only one way, i.e., 2989441 + 902500 = 1729^2 + 950^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3891941 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 (3891971) 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 5 ways as a sum of consecutive naturals, for example, 5030 + ... + 5751.

It is an arithmetic number, because the mean of its divisors is an integer number (684657).

Almost surely, 2^3891941 is an apocalyptic number.

It is an amenable number.

3891941 is a deficient number, since it is larger than the sum of its proper divisors (216001).

3891941 is a wasteful number, since it uses less digits than its factorization.

3891941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10819 (or 10800 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 3891941 is about 1972.8002939984. The cubic root of 3891941 is about 157.2975950419.

The spelling of 3891941 in words is "three million, eight hundred ninety-one thousand, nine hundred forty-one".