3978259 has 4 divisors (see below), whose sum is σ = 4037704. Its totient is φ = 3918816.

The previous prime is 3978257. The next prime is 3978263. The reversal of 3978259 is 9528793.

It is a happy number.

3978259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3978259 - 2¹ = 3978257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3978253) 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 3 ways as a sum of consecutive naturals, for example, 29622 + ... + 29755.

It is an arithmetic number, because the mean of its divisors is an integer number (1009426).

Almost surely, 2^3978259 is an apocalyptic number.

3978259 is a deficient number, since it is larger than the sum of its proper divisors (59445).

3978259 is an equidigital number, since it uses as much as digits as its factorization.

3978259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59444.

The product of its digits is 136080, while the sum is 43.

The square root of 3978259 is about 1994.5573443749. The cubic root of 3978259 is about 158.4519851776.

The spelling of 3978259 in words is "three million, nine hundred seventy-eight thousand, two hundred fifty-nine".