398008799 has 2 divisors, whose sum is σ = 398008800. Its totient is φ = 398008798.

The previous prime is 398008763. The next prime is 398008823. The reversal of 398008799 is 997800893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398008799 - 2¹² = 398004703 is a prime.

It is a super-2 number, since 2×398008799² = 316822008162844802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 398008799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398008739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199004399 + 199004400.

It is an arithmetic number, because the mean of its divisors is an integer number (199004400).

Almost surely, 2^398008799 is an apocalyptic number.

398008799 is a deficient number, since it is larger than the sum of its proper divisors (1).

398008799 is an equidigital number, since it uses as much as digits as its factorization.

398008799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 398008799 is about 19950.1578690496. The cubic root of 398008799 is about 735.5816575165.

The spelling of 398008799 in words is "three hundred ninety-eight million, eight thousand, seven hundred ninety-nine".