89645509 has 2 divisors, whose sum is σ = 89645510. Its totient is φ = 89645508.

The previous prime is 89645483. The next prime is 89645537. The reversal of 89645509 is 90554698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87329025 + 2316484 = 9345^2 + 1522^2 .

It is a cyclic number.

It is not a de Polignac number, because 89645509 - 2¹⁵ = 89612741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89645579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44822754 + 44822755.

It is an arithmetic number, because the mean of its divisors is an integer number (44822755).

Almost surely, 2^89645509 is an apocalyptic number.

It is an amenable number.

89645509 is a deficient number, since it is larger than the sum of its proper divisors (1).

89645509 is an equidigital number, since it uses as much as digits as its factorization.

89645509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 89645509 is about 9468.1312306072. The cubic root of 89645509 is about 447.5513235560.

The spelling of 89645509 in words is "eighty-nine million, six hundred forty-five thousand, five hundred nine".