870059009 has 2 divisors, whose sum is σ = 870059010. Its totient is φ = 870059008.

The previous prime is 870058999. The next prime is 870059023. The reversal of 870059009 is 900950078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 807696400 + 62362609 = 28420^2 + 7897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870059009 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 (870059089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435029504 + 435029505.

It is an arithmetic number, because the mean of its divisors is an integer number (435029505).

Almost surely, 2^870059009 is an apocalyptic number.

It is an amenable number.

870059009 is a deficient number, since it is larger than the sum of its proper divisors (1).

870059009 is an equidigital number, since it uses as much as digits as its factorization.

870059009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 870059009 is about 29496.7626867763. The cubic root of 870059009 is about 954.6618537307.

The spelling of 870059009 in words is "eight hundred seventy million, fifty-nine thousand, nine".