8146981 has 4 divisors (see below), whose sum is σ = 8153964. Its totient is φ = 8140000.

The previous prime is 8146969. The next prime is 8147039. The reversal of 8146981 is 1896418.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6300100 + 1846881 = 2510^2 + 1359^2 .

It is a cyclic number.

It is not a de Polignac number, because 8146981 - 2⁵ = 8146949 is a prime.

It is a super-2 number, since 2×8146981² = 132746598828722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8146981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8146681) 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, 1270 + ... + 4231.

It is an arithmetic number, because the mean of its divisors is an integer number (2038491).

Almost surely, 2^8146981 is an apocalyptic number.

It is an amenable number.

8146981 is a deficient number, since it is larger than the sum of its proper divisors (6983).

8146981 is a wasteful number, since it uses less digits than its factorization.

8146981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6982.

The product of its digits is 13824, while the sum is 37.

The square root of 8146981 is about 2854.2916809604. The cubic root of 8146981 is about 201.2174161205.

The spelling of 8146981 in words is "eight million, one hundred forty-six thousand, nine hundred eighty-one".