3978263 has 2 divisors, whose sum is σ = 3978264. Its totient is φ = 3978262.

The previous prime is 3978257. The next prime is 3978269. The reversal of 3978263 is 3628793.

It is a balanced prime because it is at equal distance from previous prime (3978257) and next prime (3978269).

It is a cyclic number.

It is not a de Polignac number, because 3978263 - 2¹² = 3974167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3978269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989131 + 1989132.

It is an arithmetic number, because the mean of its divisors is an integer number (1989132).

Almost surely, 2^3978263 is an apocalyptic number.

3978263 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978263 is an equidigital number, since it uses as much as digits as its factorization.

3978263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 3978263 is about 1994.5583471034. The cubic root of 3978263 is about 158.4520382835.

The spelling of 3978263 in words is "three million, nine hundred seventy-eight thousand, two hundred sixty-three".