3978513 has 24 divisors (see below), whose sum is σ = 7166016. Its totient is φ = 2066400.

The previous prime is 3978511. The next prime is 3978523. The reversal of 3978513 is 3158793.

3978513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3978513 - 2¹ = 3978511 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3978511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2178 + ... + 3563.

It is an arithmetic number, because the mean of its divisors is an integer number (298584).

Almost surely, 2^3978513 is an apocalyptic number.

3978513 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

3978513 is a deficient number, since it is larger than the sum of its proper divisors (3187503).

3978513 is a wasteful number, since it uses less digits than its factorization.

3978513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765 (or 5762 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 3978513 is about 1994.6210166345. The cubic root of 3978513 is about 158.4553573351.

The spelling of 3978513 in words is "three million, nine hundred seventy-eight thousand, five hundred thirteen".