998071 has 2 divisors, whose sum is σ = 998072. Its totient is φ = 998070.

The previous prime is 998069. The next prime is 998077. The reversal of 998071 is 170899.

It is a weak prime.

It is an emirp because it is prime and its reverse (170899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998071 - 2¹ = 998069 is a prime.

It is a super-2 number, since 2×998071² = 1992291442082, which contains 22 as substring.

Together with 998069, it forms a pair of twin primes.

998071 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499035 + 499036.

It is an arithmetic number, because the mean of its divisors is an integer number (499036).

2⁹⁹⁸⁰⁷¹ is an apocalyptic number.

998071 is a deficient number, since it is larger than the sum of its proper divisors (1).

998071 is an equidigital number, since it uses as much as digits as its factorization.

998071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 998071 is about 999.0350344207. The cubic root of 998071 is about 99.9356586107.

The spelling of 998071 in words is "nine hundred ninety-eight thousand, seventy-one".