3918133 has 4 divisors (see below), whose sum is σ = 3938220. Its totient is φ = 3898048.

The previous prime is 3918127. The next prime is 3918137. The reversal of 3918133 is 3318193.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3775249 + 142884 = 1943^2 + 378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3918133 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 (3918137) 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 3 ways as a sum of consecutive naturals, for example, 9748 + ... + 10141.

It is an arithmetic number, because the mean of its divisors is an integer number (984555).

Almost surely, 2^3918133 is an apocalyptic number.

It is an amenable number.

3918133 is a deficient number, since it is larger than the sum of its proper divisors (20087).

3918133 is a wasteful number, since it uses less digits than its factorization.

3918133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20086.

The product of its digits is 1944, while the sum is 28.

The square root of 3918133 is about 1979.4274424692. The cubic root of 3918133 is about 157.6496670871.

The spelling of 3918133 in words is "three million, nine hundred eighteen thousand, one hundred thirty-three".