398233093 has 2 divisors, whose sum is σ = 398233094. Its totient is φ = 398233092.

The previous prime is 398233091. The next prime is 398233097. The reversal of 398233093 is 390332893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311240164 + 86992929 = 17642^2 + 9327^2 .

It is an emirp because it is prime and its reverse (390332893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398233093 - 2¹ = 398233091 is a prime.

Together with 398233091, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398233091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199116546 + 199116547.

It is an arithmetic number, because the mean of its divisors is an integer number (199116547).

Almost surely, 2^398233093 is an apocalyptic number.

It is an amenable number.

398233093 is a deficient number, since it is larger than the sum of its proper divisors (1).

398233093 is an equidigital number, since it uses as much as digits as its factorization.

398233093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 398233093 is about 19955.7784363327. The cubic root of 398233093 is about 735.7198082058.

The spelling of 398233093 in words is "three hundred ninety-eight million, two hundred thirty-three thousand, ninety-three".