8949581 has 4 divisors (see below), whose sum is σ = 9072252. Its totient is φ = 8826912.

The previous prime is 8949559. The next prime is 8949601. The reversal of 8949581 is 1859498.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1859498 = 2 ⋅929749.

It can be written as a sum of positive squares in 2 ways, for example, as 1713481 + 7236100 = 1309^2 + 2690^2 .

It is a cyclic number.

It is not a de Polignac number, because 8949581 - 2⁶ = 8949517 is a prime.

It is a super-2 number, since 2×8949581² = 160190000151122, 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 (8949181) 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 3 ways as a sum of consecutive naturals, for example, 61226 + ... + 61371.

It is an arithmetic number, because the mean of its divisors is an integer number (2268063).

Almost surely, 2^8949581 is an apocalyptic number.

It is an amenable number.

8949581 is a deficient number, since it is larger than the sum of its proper divisors (122671).

8949581 is a wasteful number, since it uses less digits than its factorization.

8949581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122670.

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

The square root of 8949581 is about 2991.5850313839. The cubic root of 8949581 is about 207.6192260091.

The spelling of 8949581 in words is "eight million, nine hundred forty-nine thousand, five hundred eighty-one".