3998366399 has 2 divisors, whose sum is σ = 3998366400. Its totient is φ = 3998366398.

The previous prime is 3998366389. The next prime is 3998366429. The reversal of 3998366399 is 9936638993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3998366399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3998366369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999183199 + 1999183200.

It is an arithmetic number, because the mean of its divisors is an integer number (1999183200).

Almost surely, 2^3998366399 is an apocalyptic number.

3998366399 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998366399 is an equidigital number, since it uses as much as digits as its factorization.

3998366399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51018336, while the sum is 65.

The square root of 3998366399 is about 63232.6371346317. The cubic root of 3998366399 is about 1587.1849242145.

The spelling of 3998366399 in words is "three billion, nine hundred ninety-eight million, three hundred sixty-six thousand, three hundred ninety-nine".