398245949 has 2 divisors, whose sum is σ = 398245950. Its totient is φ = 398245948.

The previous prime is 398245937. The next prime is 398245957. The reversal of 398245949 is 949542893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246709849 + 151536100 = 15707^2 + 12310^2 .

It is a cyclic number.

It is not a de Polignac number, because 398245949 - 2¹⁶ = 398180413 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398245949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398245979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199122974 + 199122975.

It is an arithmetic number, because the mean of its divisors is an integer number (199122975).

Almost surely, 2^398245949 is an apocalyptic number.

It is an amenable number.

398245949 is a deficient number, since it is larger than the sum of its proper divisors (1).

398245949 is an equidigital number, since it uses as much as digits as its factorization.

398245949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 53.

The square root of 398245949 is about 19956.1005459483. The cubic root of 398245949 is about 735.7277251036.

The spelling of 398245949 in words is "three hundred ninety-eight million, two hundred forty-five thousand, nine hundred forty-nine".