8497981 has 4 divisors (see below), whose sum is σ = 8507200. Its totient is φ = 8488764.

The previous prime is 8497969. The next prime is 8497991. The reversal of 8497981 is 1897948.

It is a happy number.

8497981 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8497981 - 2⁹ = 8497469 is a prime.

It is a super-2 number, since 2×8497981² = 144431362152722, which contains 22 as substring.

It is a Duffinian number.

8497981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8497991) 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, 3051 + ... + 5128.

It is an arithmetic number, because the mean of its divisors is an integer number (2126800).

Almost surely, 2^8497981 is an apocalyptic number.

It is an amenable number.

8497981 is a deficient number, since it is larger than the sum of its proper divisors (9219).

8497981 is a wasteful number, since it uses less digits than its factorization.

8497981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9218.

The product of its digits is 145152, while the sum is 46.

The square root of 8497981 is about 2915.1296712153. The cubic root of 8497981 is about 204.0665952641.

The spelling of 8497981 in words is "eight million, four hundred ninety-seven thousand, nine hundred eighty-one".