3938591 has 4 divisors (see below), whose sum is σ = 3943632. Its totient is φ = 3933552.

The previous prime is 3938549. The next prime is 3938593. The reversal of 3938591 is 1958393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1958393 = 71 ⋅27583.

It is a cyclic number.

It is not a de Polignac number, because 3938591 - 2⁶ = 3938527 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 (3938593) 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, 1070 + ... + 3003.

It is an arithmetic number, because the mean of its divisors is an integer number (985908).

Almost surely, 2^3938591 is an apocalyptic number.

3938591 is a deficient number, since it is larger than the sum of its proper divisors (5041).

3938591 is an equidigital number, since it uses as much as digits as its factorization.

3938591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040.

The product of its digits is 29160, while the sum is 38.

The square root of 3938591 is about 1984.5883704184. The cubic root of 3938591 is about 157.9235730355.

The spelling of 3938591 in words is "three million, nine hundred thirty-eight thousand, five hundred ninety-one".