870507709 has 2 divisors, whose sum is σ = 870507710. Its totient is φ = 870507708.

The previous prime is 870507697. The next prime is 870507713. The reversal of 870507709 is 907705078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 866419225 + 4088484 = 29435^2 + 2022^2 .

It is a cyclic number.

It is not a de Polignac number, because 870507709 - 2⁷ = 870507581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870507739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435253854 + 435253855.

It is an arithmetic number, because the mean of its divisors is an integer number (435253855).

Almost surely, 2^870507709 is an apocalyptic number.

It is an amenable number.

870507709 is a deficient number, since it is larger than the sum of its proper divisors (1).

870507709 is an equidigital number, since it uses as much as digits as its factorization.

870507709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 43.

The square root of 870507709 is about 29504.3676258279. The cubic root of 870507709 is about 954.8259357658.

The spelling of 870507709 in words is "eight hundred seventy million, five hundred seven thousand, seven hundred nine".