89867581 has 2 divisors, whose sum is σ = 89867582. Its totient is φ = 89867580.

The previous prime is 89867567. The next prime is 89867597. The reversal of 89867581 is 18576898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53071225 + 36796356 = 7285^2 + 6066^2 .

It is a cyclic number.

It is not a de Polignac number, because 89867581 - 2⁹ = 89867069 is a prime.

It is a super-2 number, since 2×89867581² = 16152364229583122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89867501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44933790 + 44933791.

It is an arithmetic number, because the mean of its divisors is an integer number (44933791).

Almost surely, 2^89867581 is an apocalyptic number.

It is an amenable number.

89867581 is a deficient number, since it is larger than the sum of its proper divisors (1).

89867581 is an equidigital number, since it uses as much as digits as its factorization.

89867581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 52.

The square root of 89867581 is about 9479.8513173994. The cubic root of 89867581 is about 447.9205804290.

The spelling of 89867581 in words is "eighty-nine million, eight hundred sixty-seven thousand, five hundred eighty-one".