827970917 has 2 divisors, whose sum is σ = 827970918. Its totient is φ = 827970916.

The previous prime is 827970911. The next prime is 827970953. The reversal of 827970917 is 719079728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717489796 + 110481121 = 26786^2 + 10511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-827970917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (827970911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413985458 + 413985459.

It is an arithmetic number, because the mean of its divisors is an integer number (413985459).

Almost surely, 2^827970917 is an apocalyptic number.

It is an amenable number.

827970917 is a deficient number, since it is larger than the sum of its proper divisors (1).

827970917 is an equidigital number, since it uses as much as digits as its factorization.

827970917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 50.

The square root of 827970917 is about 28774.4837833800. The cubic root of 827970917 is about 939.0131929525.

The spelling of 827970917 in words is "eight hundred twenty-seven million, nine hundred seventy thousand, nine hundred seventeen".