89663569 has 2 divisors, whose sum is σ = 89663570. Its totient is φ = 89663568.

The previous prime is 89663551. The next prime is 89663611. The reversal of 89663569 is 96536698.

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., 80281600 + 9381969 = 8960^2 + 3063^2 .

It is a cyclic number.

It is not a de Polignac number, because 89663569 - 2¹⁷ = 89532497 is a prime.

It is a super-2 number, since 2×89663569² = 16079111211635522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89663549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44831784 + 44831785.

It is an arithmetic number, because the mean of its divisors is an integer number (44831785).

Almost surely, 2^89663569 is an apocalyptic number.

It is an amenable number.

89663569 is a deficient number, since it is larger than the sum of its proper divisors (1).

89663569 is an equidigital number, since it uses as much as digits as its factorization.

89663569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 52.

The square root of 89663569 is about 9469.0849082686. The cubic root of 89663569 is about 447.5813761274.

The spelling of 89663569 in words is "eighty-nine million, six hundred sixty-three thousand, five hundred sixty-nine".