398241937 has 4 divisors (see below), whose sum is σ = 403697380. Its totient is φ = 392786496.

The previous prime is 398241929. The next prime is 398241953. The reversal of 398241937 is 739142893.

It is a Cunningham number, because it is equal to 19956²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 226081296 + 172160641 = 15036^2 + 13121^2 .

It is a cyclic number.

It is not a de Polignac number, because 398241937 - 2³ = 398241929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398241997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2727612 + ... + 2727757.

It is an arithmetic number, because the mean of its divisors is an integer number (100924345).

Almost surely, 2^398241937 is an apocalyptic number.

It is an amenable number.

398241937 is a deficient number, since it is larger than the sum of its proper divisors (5455443).

398241937 is an equidigital number, since it uses as much as digits as its factorization.

398241937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5455442.

The product of its digits is 326592, while the sum is 46.

The square root of 398241937 is about 19956.0000250551. Note that the first 4 decimals coincide. The cubic root of 398241937 is about 735.7252544783.

The spelling of 398241937 in words is "three hundred ninety-eight million, two hundred forty-one thousand, nine hundred thirty-seven".