3958191 has 6 divisors (see below), whose sum is σ = 5717400. Its totient is φ = 2638788.

The previous prime is 3958183. The next prime is 3958211. The reversal of 3958191 is 1918593.

It is a happy number.

It is not a de Polignac number, because 3958191 - 2³ = 3958183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958091) 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, 219891 + ... + 219908.

It is an arithmetic number, because the mean of its divisors is an integer number (952900).

Almost surely, 2^3958191 is an apocalyptic number.

3958191 is a deficient number, since it is larger than the sum of its proper divisors (1759209).

3958191 is a wasteful number, since it uses less digits than its factorization.

3958191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439805 (or 439802 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 3958191 is about 1989.5202939402. The cubic root of 3958191 is about 158.1851032539.

The spelling of 3958191 in words is "three million, nine hundred fifty-eight thousand, one hundred ninety-one".