3978329 has 2 divisors, whose sum is σ = 3978330. Its totient is φ = 3978328.

The previous prime is 3978301. The next prime is 3978349. The reversal of 3978329 is 9238793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3553225 + 425104 = 1885^2 + 652^2 .

It is a cyclic number.

It is not a de Polignac number, because 3978329 - 2²⁰ = 2929753 is a prime.

It is not a weakly prime, because it can be changed into another prime (3978349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989164 + 1989165.

It is an arithmetic number, because the mean of its divisors is an integer number (1989165).

Almost surely, 2^3978329 is an apocalyptic number.

It is an amenable number.

3978329 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978329 is an equidigital number, since it uses as much as digits as its factorization.

3978329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 3978329 is about 1994.5748920509. The cubic root of 3978329 is about 158.4529145266.

The spelling of 3978329 in words is "three million, nine hundred seventy-eight thousand, three hundred twenty-nine".