971998 has 8 divisors (see below), whose sum is σ = 1465992. Its totient is φ = 483336.

The previous prime is 971989. The next prime is 972001. The reversal of 971998 is 899179.

971998 is nontrivially palindromic in base 16.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×971998² = 1889560224008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (183249).

2⁹⁷¹⁹⁹⁸ is an apocalyptic number.

971998 is a deficient number, since it is larger than the sum of its proper divisors (493994).

971998 is a wasteful number, since it uses less digits than its factorization.

971998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666.

The product of its digits is 40824, while the sum is 43.

The square root of 971998 is about 985.8995892077. The cubic root of 971998 is about 99.0577495259.

The spelling of 971998 in words is "nine hundred seventy-one thousand, nine hundred ninety-eight".