871970609 has 2 divisors, whose sum is σ = 871970610. Its totient is φ = 871970608.

The previous prime is 871970597. The next prime is 871970611. The reversal of 871970609 is 906079178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869070400 + 2900209 = 29480^2 + 1703^2 .

It is a cyclic number.

It is not a de Polignac number, because 871970609 - 2⁸ = 871970353 is a prime.

Together with 871970611, 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 (871970639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435985304 + 435985305.

It is an arithmetic number, because the mean of its divisors is an integer number (435985305).

Almost surely, 2^871970609 is an apocalyptic number.

It is an amenable number.

871970609 is a deficient number, since it is larger than the sum of its proper divisors (1).

871970609 is an equidigital number, since it uses as much as digits as its factorization.

871970609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 871970609 is about 29529.1484638484. The cubic root of 871970609 is about 955.3605024029.

The spelling of 871970609 in words is "eight hundred seventy-one million, nine hundred seventy thousand, six hundred nine".