786981 has 16 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 455424.

The previous prime is 786979. The next prime is 786983. The reversal of 786981 is 189687.

It is an interprime number because it is at equal distance from previous prime (786979) and next prime (786983).

It is not a de Polignac number, because 786981 - 2¹ = 786979 is a prime.

It is a super-2 number, since 2×786981² = 1238678188722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 786981.

It is not an unprimeable number, because it can be changed into a prime (786983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70 + ... + 1256.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2⁷⁸⁶⁹⁸¹ is an apocalyptic number.

It is an amenable number.

786981 is a deficient number, since it is larger than the sum of its proper divisors (410523).

786981 is a wasteful number, since it uses less digits than its factorization.

786981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

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

The square root of 786981 is about 887.1194958967. The cubic root of 786981 is about 92.3254463180.

The spelling of 786981 in words is "seven hundred eighty-six thousand, nine hundred eighty-one".