971715851 has 2 divisors, whose sum is σ = 971715852. Its totient is φ = 971715850.

The previous prime is 971715839. The next prime is 971715853. The reversal of 971715851 is 158517179.

It is a strong prime.

It is an emirp because it is prime and its reverse (158517179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971715851 - 2¹⁰ = 971714827 is a prime.

It is a Sophie Germain prime.

Together with 971715853, 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 (971715853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485857925 + 485857926.

It is an arithmetic number, because the mean of its divisors is an integer number (485857926).

Almost surely, 2^971715851 is an apocalyptic number.

971715851 is a deficient number, since it is larger than the sum of its proper divisors (1).

971715851 is an equidigital number, since it uses as much as digits as its factorization.

971715851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 44.

The square root of 971715851 is about 31172.3571614339. The cubic root of 971715851 is about 990.4816385812.

The spelling of 971715851 in words is "nine hundred seventy-one million, seven hundred fifteen thousand, eight hundred fifty-one".