89138009 has 2 divisors, whose sum is σ = 89138010. Its totient is φ = 89138008.

The previous prime is 89138003. The next prime is 89138029. The reversal of 89138009 is 90083198.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69139225 + 19998784 = 8315^2 + 4472^2 .

It is a cyclic number.

It is not a de Polignac number, because 89138009 - 2²⁰ = 88089433 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (89138003) 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, 44569004 + 44569005.

It is an arithmetic number, because the mean of its divisors is an integer number (44569005).

Almost surely, 2^89138009 is an apocalyptic number.

It is an amenable number.

89138009 is a deficient number, since it is larger than the sum of its proper divisors (1).

89138009 is an equidigital number, since it uses as much as digits as its factorization.

89138009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 89138009 is about 9441.2927610577. The cubic root of 89138009 is about 446.7051675310.

The spelling of 89138009 in words is "eighty-nine million, one hundred thirty-eight thousand, nine".