8679581 has 2 divisors, whose sum is σ = 8679582. Its totient is φ = 8679580.

The previous prime is 8679557. The next prime is 8679607. The reversal of 8679581 is 1859768.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8031556 + 648025 = 2834^2 + 805^2 .

It is a cyclic number.

It is not a de Polignac number, because 8679581 - 2¹⁰ = 8678557 is a prime.

It is a super-2 number, since 2×8679581² = 150670252671122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8679551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4339790 + 4339791.

It is an arithmetic number, because the mean of its divisors is an integer number (4339791).

Almost surely, 2^8679581 is an apocalyptic number.

It is an amenable number.

8679581 is a deficient number, since it is larger than the sum of its proper divisors (1).

8679581 is an equidigital number, since it uses as much as digits as its factorization.

8679581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 44.

The square root of 8679581 is about 2946.1128627396. The cubic root of 8679581 is about 205.5099814989.

The spelling of 8679581 in words is "eight million, six hundred seventy-nine thousand, five hundred eighty-one".