3921867 has 6 divisors (see below), whose sum is σ = 5664932. Its totient is φ = 2614572.

The previous prime is 3921859. The next prime is 3921877. The reversal of 3921867 is 7681293.

It is not a de Polignac number, because 3921867 - 2³ = 3921859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217873 + ... + 217890.

Almost surely, 2^3921867 is an apocalyptic number.

3921867 is a deficient number, since it is larger than the sum of its proper divisors (1743065).

3921867 is a wasteful number, since it uses less digits than its factorization.

3921867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435769 (or 435766 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 3921867 is about 1980.3704198962. The cubic root of 3921867 is about 157.6997314890.

The spelling of 3921867 in words is "three million, nine hundred twenty-one thousand, eight hundred sixty-seven".