3978133 has 4 divisors (see below), whose sum is σ = 4115340. Its totient is φ = 3840928.

The previous prime is 3978113. The next prime is 3978167. The reversal of 3978133 is 3318793.

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 2241009 + 1737124 = 1497^2 + 1318^2 .

It is a cyclic number.

It is not a de Polignac number, because 3978133 - 2⁵ = 3978101 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 (3978113) 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, 68560 + ... + 68617.

It is an arithmetic number, because the mean of its divisors is an integer number (1028835).

Almost surely, 2^3978133 is an apocalyptic number.

It is an amenable number.

3978133 is a deficient number, since it is larger than the sum of its proper divisors (137207).

3978133 is a wasteful number, since it uses less digits than its factorization.

3978133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137206.

The product of its digits is 13608, while the sum is 34.

The square root of 3978133 is about 1994.5257581691. The cubic root of 3978133 is about 158.4503123218.

The spelling of 3978133 in words is "three million, nine hundred seventy-eight thousand, one hundred thirty-three".