398452973 has 2 divisors, whose sum is σ = 398452974. Its totient is φ = 398452972.

The previous prime is 398452937. The next prime is 398453017. The reversal of 398452973 is 379254893.

It is a happy number.

Together with previous prime (398452937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388799524 + 9653449 = 19718^2 + 3107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398452973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398452573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199226486 + 199226487.

It is an arithmetic number, because the mean of its divisors is an integer number (199226487).

Almost surely, 2^398452973 is an apocalyptic number.

It is an amenable number.

398452973 is a deficient number, since it is larger than the sum of its proper divisors (1).

398452973 is an equidigital number, since it uses as much as digits as its factorization.

398452973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 50.

The square root of 398452973 is about 19961.2868573146. The cubic root of 398452973 is about 735.8551898121.

The spelling of 398452973 in words is "three hundred ninety-eight million, four hundred fifty-two thousand, nine hundred seventy-three".