398887 has 2 divisors, whose sum is σ = 398888. Its totient is φ = 398886.

The previous prime is 398863. The next prime is 398903. The reversal of 398887 is 788893.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398887 - 2⁷ = 398759 is a prime.

It is a super-2 number, since 2×398887² = 318221677538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199443 + 199444.

It is an arithmetic number, because the mean of its divisors is an integer number (199444).

2³⁹⁸⁸⁸⁷ is an apocalyptic number.

398887 is a deficient number, since it is larger than the sum of its proper divisors (1).

398887 is an equidigital number, since it uses as much as digits as its factorization.

398887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 398887 is about 631.5750153386. The cubic root of 398887 is about 73.6122277061.

The spelling of 398887 in words is "three hundred ninety-eight thousand, eight hundred eighty-seven".