398032361 has 2 divisors, whose sum is σ = 398032362. Its totient is φ = 398032360.

The previous prime is 398032321. The next prime is 398032363. The reversal of 398032361 is 163230893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374809600 + 23222761 = 19360^2 + 4819^2 .

It is a cyclic number.

It is not a de Polignac number, because 398032361 - 2¹⁴ = 398015977 is a prime.

It is a Sophie Germain prime.

Together with 398032363, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_21236867 and since 398032361 and 21236867 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (398032363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199016180 + 199016181.

It is an arithmetic number, because the mean of its divisors is an integer number (199016181).

Almost surely, 2^398032361 is an apocalyptic number.

It is an amenable number.

398032361 is a deficient number, since it is larger than the sum of its proper divisors (1).

398032361 is an equidigital number, since it uses as much as digits as its factorization.

398032361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 398032361 is about 19950.7483819530. The cubic root of 398032361 is about 735.5961726336.

The spelling of 398032361 in words is "three hundred ninety-eight million, thirty-two thousand, three hundred sixty-one".