398771 has 2 divisors, whose sum is σ = 398772. Its totient is φ = 398770.

The previous prime is 398759. The next prime is 398813. The reversal of 398771 is 177893.

It is a weak prime.

It is an emirp because it is prime and its reverse (177893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199385 + 199386.

It is an arithmetic number, because the mean of its divisors is an integer number (199386).

2³⁹⁸⁷⁷¹ is an apocalyptic number.

398771 is a deficient number, since it is larger than the sum of its proper divisors (1).

398771 is an equidigital number, since it uses as much as digits as its factorization.

398771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 35.

The square root of 398771 is about 631.4831747561. The cubic root of 398771 is about 73.6050913105.

The spelling of 398771 in words is "three hundred ninety-eight thousand, seven hundred seventy-one".