398740283 has 2 divisors, whose sum is σ = 398740284. Its totient is φ = 398740282.

The previous prime is 398740229. The next prime is 398740291. The reversal of 398740283 is 382047893.

It is a strong prime.

It is an emirp because it is prime and its reverse (382047893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398740283 - 2¹⁰ = 398739259 is a prime.

It is not a weakly prime, because it can be changed into another prime (398740483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199370141 + 199370142.

It is an arithmetic number, because the mean of its divisors is an integer number (199370142).

Almost surely, 2^398740283 is an apocalyptic number.

398740283 is a deficient number, since it is larger than the sum of its proper divisors (1).

398740283 is an equidigital number, since it uses as much as digits as its factorization.

398740283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 398740283 is about 19968.4822407713. The cubic root of 398740283 is about 736.0320134892.

The spelling of 398740283 in words is "three hundred ninety-eight million, seven hundred forty thousand, two hundred eighty-three".