980891 has 4 divisors (see below), whose sum is σ = 990000. Its totient is φ = 971784.

The previous prime is 980887. The next prime is 980893. The reversal of 980891 is 198089.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198089 = 113 ⋅1753.

It is a cyclic number.

It is not a de Polignac number, because 980891 - 2² = 980887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 980891.

It is not an unprimeable number, because it can be changed into a prime (980893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4391 + ... + 4608.

It is an arithmetic number, because the mean of its divisors is an integer number (247500).

2⁹⁸⁰⁸⁹¹ is an apocalyptic number.

980891 is a deficient number, since it is larger than the sum of its proper divisors (9109).

980891 is a wasteful number, since it uses less digits than its factorization.

980891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9108.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 980891 is about 990.3994143779. The cubic root of 980891 is about 99.3589324391.

The spelling of 980891 in words is "nine hundred eighty thousand, eight hundred ninety-one".