398494427 has 2 divisors, whose sum is σ = 398494428. Its totient is φ = 398494426.

The previous prime is 398494409. The next prime is 398494451. The reversal of 398494427 is 724494893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398494427 - 2²⁴ = 381717211 is a prime.

It is not a weakly prime, because it can be changed into another prime (398494727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199247213 + 199247214.

It is an arithmetic number, because the mean of its divisors is an integer number (199247214).

Almost surely, 2^398494427 is an apocalyptic number.

398494427 is a deficient number, since it is larger than the sum of its proper divisors (1).

398494427 is an equidigital number, since it uses as much as digits as its factorization.

398494427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 50.

The square root of 398494427 is about 19962.3251902177. The cubic root of 398494427 is about 735.8807077404.

The spelling of 398494427 in words is "three hundred ninety-eight million, four hundred ninety-four thousand, four hundred twenty-seven".