8813981 has 8 divisors (see below), whose sum is σ = 9660000. Its totient is φ = 7975440.

The previous prime is 8813971. The next prime is 8813983. The reversal of 8813981 is 1893188.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8813981 - 2¹⁴ = 8797597 is a prime.

It is a super-2 number, since 2×8813981² = 155372522136722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8813983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770 + ... + 4268.

It is an arithmetic number, because the mean of its divisors is an integer number (1207500).

Almost surely, 2^8813981 is an apocalyptic number.

It is an amenable number.

8813981 is a deficient number, since it is larger than the sum of its proper divisors (846019).

8813981 is a wasteful number, since it uses less digits than its factorization.

8813981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3739.

The product of its digits is 13824, while the sum is 38.

The square root of 8813981 is about 2968.8349566791. The cubic root of 8813981 is about 206.5653009089.

The spelling of 8813981 in words is "eight million, eight hundred thirteen thousand, nine hundred eighty-one".