3980399 has 2 divisors, whose sum is σ = 3980400. Its totient is φ = 3980398.

The previous prime is 3980387. The next prime is 3980401. The reversal of 3980399 is 9930893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3980399 - 2⁸ = 3980143 is a prime.

Together with 3980401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3980359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990199 + 1990200.

It is an arithmetic number, because the mean of its divisors is an integer number (1990200).

Almost surely, 2^3980399 is an apocalyptic number.

3980399 is a deficient number, since it is larger than the sum of its proper divisors (1).

3980399 is an equidigital number, since it uses as much as digits as its factorization.

3980399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 3980399 is about 1995.0937321339. The cubic root of 3980399 is about 158.4803917800.

The spelling of 3980399 in words is "three million, nine hundred eighty thousand, three hundred ninety-nine".