8648981 has 4 divisors (see below), whose sum is σ = 9435264. Its totient is φ = 7862700.

The previous prime is 8648953. The next prime is 8649001. The reversal of 8648981 is 1898468.

8648981 = 329² + 330² + ... + 394².

It is a happy number.

8648981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8648981 - 2¹⁴ = 8632597 is a prime.

It is a super-2 number, since 2×8648981² = 149609744676722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8648921) 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, 393125 + ... + 393146.

It is an arithmetic number, because the mean of its divisors is an integer number (2358816).

Almost surely, 2^8648981 is an apocalyptic number.

It is an amenable number.

8648981 is a deficient number, since it is larger than the sum of its proper divisors (786283).

8648981 is a wasteful number, since it uses less digits than its factorization.

8648981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786282.

The product of its digits is 110592, while the sum is 44.

The square root of 8648981 is about 2940.9149936712. The cubic root of 8648981 is about 205.2681875638.

The spelling of 8648981 in words is "eight million, six hundred forty-eight thousand, nine hundred eighty-one".