3998447393 has 2 divisors, whose sum is σ = 3998447394. Its totient is φ = 3998447392.

The previous prime is 3998447357. The next prime is 3998447417. The reversal of 3998447393 is 3937448993.

3998447393 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3077142784 + 921304609 = 55472^2 + 30353^2 .

It is an emirp because it is prime and its reverse (3937448993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3998447393 - 2⁶ = 3998447329 is a prime.

It is not a weakly prime, because it can be changed into another prime (3998447293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999223696 + 1999223697.

It is an arithmetic number, because the mean of its divisors is an integer number (1999223697).

Almost surely, 2^3998447393 is an apocalyptic number.

It is an amenable number.

3998447393 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998447393 is an equidigital number, since it uses as much as digits as its factorization.

3998447393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 59.

The square root of 3998447393 is about 63233.2775759726. The cubic root of 3998447393 is about 1587.1956412236.

The spelling of 3998447393 in words is "three billion, nine hundred ninety-eight million, four hundred forty-seven thousand, three hundred ninety-three".