3978959 has 4 divisors (see below), whose sum is σ = 3991104. Its totient is φ = 3966816.

The previous prime is 3978917. The next prime is 3978967. The reversal of 3978959 is 9598793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9598793 = 701 ⋅13693.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978959 is a prime.

It is a super-2 number, since 2×3978959² = 31664229447362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5567 + ... + 6240.

It is an arithmetic number, because the mean of its divisors is an integer number (997776).

Almost surely, 2^3978959 is an apocalyptic number.

3978959 is a deficient number, since it is larger than the sum of its proper divisors (12145).

3978959 is a wasteful number, since it uses less digits than its factorization.

3978959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12144.

The product of its digits is 612360, while the sum is 50.

The square root of 3978959 is about 1994.7328141884. The cubic root of 3978959 is about 158.4612781778.

The spelling of 3978959 in words is "three million, nine hundred seventy-eight thousand, nine hundred fifty-nine".