398438737 has 2 divisors, whose sum is σ = 398438738. Its totient is φ = 398438736.

The previous prime is 398438713. The next prime is 398438771. The reversal of 398438737 is 737834893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380874256 + 17564481 = 19516^2 + 4191^2 .

It is a cyclic number.

It is not a de Polignac number, because 398438737 - 2⁷ = 398438609 is a prime.

It is not a weakly prime, because it can be changed into another prime (398438437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199219368 + 199219369.

It is an arithmetic number, because the mean of its divisors is an integer number (199219369).

Almost surely, 2^398438737 is an apocalyptic number.

It is an amenable number.

398438737 is a deficient number, since it is larger than the sum of its proper divisors (1).

398438737 is an equidigital number, since it uses as much as digits as its factorization.

398438737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 52.

The square root of 398438737 is about 19960.9302638930. The cubic root of 398438737 is about 735.8464261185.

The spelling of 398438737 in words is "three hundred ninety-eight million, four hundred thirty-eight thousand, seven hundred thirty-seven".