398444699 has 2 divisors, whose sum is σ = 398444700. Its totient is φ = 398444698.

The previous prime is 398444621. The next prime is 398444719. The reversal of 398444699 is 996444893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398444699 is a prime.

It is a super-2 number, since 2×398444699² = 317516356322401202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398444609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199222349 + 199222350.

It is an arithmetic number, because the mean of its divisors is an integer number (199222350).

Almost surely, 2^398444699 is an apocalyptic number.

398444699 is a deficient number, since it is larger than the sum of its proper divisors (1).

398444699 is an equidigital number, since it uses as much as digits as its factorization.

398444699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 56.

The square root of 398444699 is about 19961.0796050715. The cubic root of 398444699 is about 735.8500963561.

The spelling of 398444699 in words is "three hundred ninety-eight million, four hundred forty-four thousand, six hundred ninety-nine".