398202089 has 2 divisors, whose sum is σ = 398202090. Its totient is φ = 398202088.

The previous prime is 398202073. The next prime is 398202113. The reversal of 398202089 is 980202893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398202025 + 64 = 19955^2 + 8^2 .

It is an emirp because it is prime and its reverse (980202893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398202089 - 2⁴ = 398202073 is a prime.

It is not a weakly prime, because it can be changed into another prime (398205089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199101044 + 199101045.

It is an arithmetic number, because the mean of its divisors is an integer number (199101045).

Almost surely, 2^398202089 is an apocalyptic number.

It is an amenable number.

398202089 is a deficient number, since it is larger than the sum of its proper divisors (1).

398202089 is an equidigital number, since it uses as much as digits as its factorization.

398202089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 398202089 is about 19955.0016036081. The cubic root of 398202089 is about 735.7007148245.

The spelling of 398202089 in words is "three hundred ninety-eight million, two hundred two thousand, eighty-nine".