871099979 has 2 divisors, whose sum is σ = 871099980. Its totient is φ = 871099978.

The previous prime is 871099963. The next prime is 871099993. The reversal of 871099979 is 979990178.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 871099979 - 2⁴ = 871099963 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (871099939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435549989 + 435549990.

It is an arithmetic number, because the mean of its divisors is an integer number (435549990).

Almost surely, 2^871099979 is an apocalyptic number.

871099979 is a deficient number, since it is larger than the sum of its proper divisors (1).

871099979 is an equidigital number, since it uses as much as digits as its factorization.

871099979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 59.

The square root of 871099979 is about 29514.4029077330. The cubic root of 871099979 is about 955.0424326239.

The spelling of 871099979 in words is "eight hundred seventy-one million, ninety-nine thousand, nine hundred seventy-nine".