398452237 has 2 divisors, whose sum is σ = 398452238. Its totient is φ = 398452236.

The previous prime is 398452231. The next prime is 398452261. The reversal of 398452237 is 732254893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219454596 + 178997641 = 14814^2 + 13379^2 .

It is an emirp because it is prime and its reverse (732254893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398452237 - 2²³ = 390063629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398452193 and 398452202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398452231) 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, 199226118 + 199226119.

It is an arithmetic number, because the mean of its divisors is an integer number (199226119).

Almost surely, 2^398452237 is an apocalyptic number.

It is an amenable number.

398452237 is a deficient number, since it is larger than the sum of its proper divisors (1).

398452237 is an equidigital number, since it uses as much as digits as its factorization.

398452237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 398452237 is about 19961.2684216209. The cubic root of 398452237 is about 735.8547367350.

The spelling of 398452237 in words is "three hundred ninety-eight million, four hundred fifty-two thousand, two hundred thirty-seven".