3958111 has 4 divisors (see below), whose sum is σ = 4085824. Its totient is φ = 3830400.

The previous prime is 3958109. The next prime is 3958147. The reversal of 3958111 is 1118593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1118593 = 7 ⋅159799.

It is a cyclic number.

It is not a de Polignac number, because 3958111 - 2¹ = 3958109 is a prime.

It is the 1990-th Hogben number.

It is a Duffinian number.

3958111 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3958111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958211) by changing a digit.

It is a nontrivial repunit in base 1989.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63810 + ... + 63871.

It is an arithmetic number, because the mean of its divisors is an integer number (1021456).

Almost surely, 2^3958111 is an apocalyptic number.

3958111 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3958111 is a deficient number, since it is larger than the sum of its proper divisors (127713).

3958111 is a wasteful number, since it uses less digits than its factorization.

3958111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127712.

The product of its digits is 1080, while the sum is 28.

The square root of 3958111 is about 1989.5001884896. The cubic root of 3958111 is about 158.1840375404.

The spelling of 3958111 in words is "three million, nine hundred fifty-eight thousand, one hundred eleven".