398049089 has 2 divisors, whose sum is σ = 398049090. Its totient is φ = 398049088.

The previous prime is 398049073. The next prime is 398049131. The reversal of 398049089 is 980940893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259210000 + 138839089 = 16100^2 + 11783^2 .

It is a cyclic number.

It is not a de Polignac number, because 398049089 - 2⁴ = 398049073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398049019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199024544 + 199024545.

It is an arithmetic number, because the mean of its divisors is an integer number (199024545).

Almost surely, 2^398049089 is an apocalyptic number.

It is an amenable number.

398049089 is a deficient number, since it is larger than the sum of its proper divisors (1).

398049089 is an equidigital number, since it uses as much as digits as its factorization.

398049089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 398049089 is about 19951.1676099420. The cubic root of 398049089 is about 735.6064773907.

The spelling of 398049089 in words is "three hundred ninety-eight million, forty-nine thousand, eighty-nine".