971862889 has 2 divisors, whose sum is σ = 971862890. Its totient is φ = 971862888.

The previous prime is 971862869. The next prime is 971862929. The reversal of 971862889 is 988268179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 918090000 + 53772889 = 30300^2 + 7333^2 .

It is a cyclic number.

It is not a de Polignac number, because 971862889 - 2¹⁵ = 971830121 is a prime.

It is not a weakly prime, because it can be changed into another prime (971862869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485931444 + 485931445.

It is an arithmetic number, because the mean of its divisors is an integer number (485931445).

Almost surely, 2^971862889 is an apocalyptic number.

It is an amenable number.

971862889 is a deficient number, since it is larger than the sum of its proper divisors (1).

971862889 is an equidigital number, since it uses as much as digits as its factorization.

971862889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 58.

The square root of 971862889 is about 31174.7155400013. The cubic root of 971862889 is about 990.5315952614.

The spelling of 971862889 in words is "nine hundred seventy-one million, eight hundred sixty-two thousand, eight hundred eighty-nine".