3978023 has 4 divisors (see below), whose sum is σ = 4546320. Its totient is φ = 3409728.

The previous prime is 3977999. The next prime is 3978031. The reversal of 3978023 is 3208793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3208793 = 7 ⋅458399.

It is not a de Polignac number, because 3978023 - 2¹² = 3973927 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 (3978043) 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, 284138 + ... + 284151.

It is an arithmetic number, because the mean of its divisors is an integer number (1136580).

Almost surely, 2^3978023 is an apocalyptic number.

3978023 is a deficient number, since it is larger than the sum of its proper divisors (568297).

3978023 is an equidigital number, since it uses as much as digits as its factorization.

3978023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568296.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 3978023 is about 1994.4981825011. The cubic root of 3978023 is about 158.4488518632.

The spelling of 3978023 in words is "three million, nine hundred seventy-eight thousand, twenty-three".