806981 has 12 divisors (see below), whose sum is σ = 963072. Its totient is φ = 673848.

The previous prime is 806977. The next prime is 806999. The reversal of 806981 is 189608.

It is not a de Polignac number, because 806981 - 2² = 806977 is a prime.

It is a super-2 number, since 2×806981² = 1302436668722, which contains 22 as substring.

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 806981.

It is not an unprimeable number, because it can be changed into a prime (806941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1916 + ... + 2298.

It is an arithmetic number, because the mean of its divisors is an integer number (80256).

2⁸⁰⁶⁹⁸¹ is an apocalyptic number.

It is an amenable number.

806981 is a deficient number, since it is larger than the sum of its proper divisors (156091).

806981 is a wasteful number, since it uses less digits than its factorization.

806981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 806981 is about 898.3212120394. The cubic root of 806981 is about 93.1010194548.

The spelling of 806981 in words is "eight hundred six thousand, nine hundred eighty-one".