867981 has 12 divisors (see below), whose sum is σ = 1191008. Its totient is φ = 562224.

The previous prime is 867959. The next prime is 867991. The reversal of 867981 is 189768.

It is not a de Polignac number, because 867981 - 2¹¹ = 865933 is a prime.

It is a super-2 number, since 2×867981² = 1506782032722, 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 867981.

It is not an unprimeable number, because it can be changed into a prime (867991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8376 + ... + 8478.

2⁸⁶⁷⁹⁸¹ is an apocalyptic number.

It is an amenable number.

867981 is a deficient number, since it is larger than the sum of its proper divisors (323027).

867981 is a wasteful number, since it uses less digits than its factorization.

867981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 159 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 867981 is about 931.6549790561. The cubic root of 867981 is about 95.3901224341.

The spelling of 867981 in words is "eight hundred sixty-seven thousand, nine hundred eighty-one".