398915141 has 2 divisors, whose sum is σ = 398915142. Its totient is φ = 398915140.

The previous prime is 398915137. The next prime is 398915147. The reversal of 398915141 is 141519893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280562500 + 118352641 = 16750^2 + 10879^2 .

It is a cyclic number.

It is not a de Polignac number, because 398915141 - 2² = 398915137 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398915147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199457570 + 199457571.

It is an arithmetic number, because the mean of its divisors is an integer number (199457571).

Almost surely, 2^398915141 is an apocalyptic number.

It is an amenable number.

398915141 is a deficient number, since it is larger than the sum of its proper divisors (1).

398915141 is an equidigital number, since it uses as much as digits as its factorization.

398915141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 41.

The square root of 398915141 is about 19972.8601106602. The cubic root of 398915141 is about 736.1395875024.

The spelling of 398915141 in words is "three hundred ninety-eight million, nine hundred fifteen thousand, one hundred forty-one".