8897981 has 4 divisors (see below), whose sum is σ = 8904192. Its totient is φ = 8891772.

The previous prime is 8897969. The next prime is 8897989. The reversal of 8897981 is 1897988.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-8897981 is a prime.

It is a super-2 number, since 2×8897981² = 158348131752722, 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 (8897989) 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, 260 + ... + 4226.

It is an arithmetic number, because the mean of its divisors is an integer number (2226048).

Almost surely, 2^8897981 is an apocalyptic number.

It is an amenable number.

8897981 is a deficient number, since it is larger than the sum of its proper divisors (6211).

8897981 is a wasteful number, since it uses less digits than its factorization.

8897981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210.

The product of its digits is 290304, while the sum is 50.

The square root of 8897981 is about 2982.9483736733. The cubic root of 8897981 is about 207.2194379209.

The spelling of 8897981 in words is "eight million, eight hundred ninety-seven thousand, nine hundred eighty-one".