8981945 has 24 divisors (see below), whose sum is σ = 12764808. Its totient is φ = 6048000.

The previous prime is 8981941. The next prime is 8981957. The reversal of 8981945 is 5491898.

8981945 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in 4 ways, for example, as 379456 + 8602489 = 616^2 + 2933^2 .

It is not a de Polignac number, because 8981945 - 2² = 8981941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8981896 and 8981905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8981941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14645 + ... + 15245.

It is an arithmetic number, because the mean of its divisors is an integer number (531867).

Almost surely, 2^8981945 is an apocalyptic number.

It is an amenable number.

8981945 is a deficient number, since it is larger than the sum of its proper divisors (3782863).

8981945 is a wasteful number, since it uses less digits than its factorization.

8981945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 674 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 8981945 is about 2996.9893226370. The cubic root of 8981945 is about 207.8691932117.

The spelling of 8981945 in words is "eight million, nine hundred eighty-one thousand, nine hundred forty-five".