89711009 has 2 divisors, whose sum is σ = 89711010. Its totient is φ = 89711008.

The previous prime is 89710997. The next prime is 89711059. The reversal of 89711009 is 90011798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77440000 + 12271009 = 8800^2 + 3503^2 .

It is a cyclic number.

It is not a de Polignac number, because 89711009 - 2¹² = 89706913 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89711009.

It is not a weakly prime, because it can be changed into another prime (89711059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44855504 + 44855505.

It is an arithmetic number, because the mean of its divisors is an integer number (44855505).

Almost surely, 2^89711009 is an apocalyptic number.

It is an amenable number.

89711009 is a deficient number, since it is larger than the sum of its proper divisors (1).

89711009 is an equidigital number, since it uses as much as digits as its factorization.

89711009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 89711009 is about 9471.5895709221. The cubic root of 89711009 is about 447.6602989908.

The spelling of 89711009 in words is "eighty-nine million, seven hundred eleven thousand, nine".