89671009 has 2 divisors, whose sum is σ = 89671010. Its totient is φ = 89671008.

The previous prime is 89671007. The next prime is 89671033. The reversal of 89671009 is 90017698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70090384 + 19580625 = 8372^2 + 4425^2 .

It is a cyclic number.

It is not a de Polignac number, because 89671009 - 2¹ = 89671007 is a prime.

Together with 89671007, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89671007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44835504 + 44835505.

It is an arithmetic number, because the mean of its divisors is an integer number (44835505).

Almost surely, 2^89671009 is an apocalyptic number.

It is an amenable number.

89671009 is a deficient number, since it is larger than the sum of its proper divisors (1).

89671009 is an equidigital number, since it uses as much as digits as its factorization.

89671009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 89671009 is about 9469.4777575112. The cubic root of 89671009 is about 447.5937554150.

The spelling of 89671009 in words is "eighty-nine million, six hundred seventy-one thousand, nine".