398411999 has 2 divisors, whose sum is σ = 398412000. Its totient is φ = 398411998.

The previous prime is 398411989. The next prime is 398412011. The reversal of 398411999 is 999114893.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398411999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398411999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398411929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199205999 + 199206000.

It is an arithmetic number, because the mean of its divisors is an integer number (199206000).

Almost surely, 2^398411999 is an apocalyptic number.

398411999 is a deficient number, since it is larger than the sum of its proper divisors (1).

398411999 is an equidigital number, since it uses as much as digits as its factorization.

398411999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 53.

The square root of 398411999 is about 19960.2604942922. The cubic root of 398411999 is about 735.8299656190.

The spelling of 398411999 in words is "three hundred ninety-eight million, four hundred eleven thousand, nine hundred ninety-nine".