89665061 has 2 divisors, whose sum is σ = 89665062. Its totient is φ = 89665060.

The previous prime is 89665033. The next prime is 89665091. The reversal of 89665061 is 16056698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70040161 + 19624900 = 8369^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 89665061 - 2¹⁰ = 89664037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89665031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44832530 + 44832531.

It is an arithmetic number, because the mean of its divisors is an integer number (44832531).

Almost surely, 2^89665061 is an apocalyptic number.

It is an amenable number.

89665061 is a deficient number, since it is larger than the sum of its proper divisors (1).

89665061 is an equidigital number, since it uses as much as digits as its factorization.

89665061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 89665061 is about 9469.1636906329. The cubic root of 89665061 is about 447.5838586953.

The spelling of 89665061 in words is "eighty-nine million, six hundred sixty-five thousand, sixty-one".