398241953 has 2 divisors, whose sum is σ = 398241954. Its totient is φ = 398241952.

The previous prime is 398241929. The next prime is 398241971. The reversal of 398241953 is 359142893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267093649 + 131148304 = 16343^2 + 11452^2 .

It is a cyclic number.

It is not a de Polignac number, because 398241953 - 2¹² = 398237857 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (398241973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199120976 + 199120977.

It is an arithmetic number, because the mean of its divisors is an integer number (199120977).

Almost surely, 2^398241953 is an apocalyptic number.

It is an amenable number.

398241953 is a deficient number, since it is larger than the sum of its proper divisors (1).

398241953 is an equidigital number, since it uses as much as digits as its factorization.

398241953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 398241953 is about 19956.0004259371. Note that the first 3 decimals coincide. The cubic root of 398241953 is about 735.7252643313.

The spelling of 398241953 in words is "three hundred ninety-eight million, two hundred forty-one thousand, nine hundred fifty-three".