971309 has 2 divisors, whose sum is σ = 971310. Its totient is φ = 971308.

The previous prime is 971291. The next prime is 971339. The reversal of 971309 is 903179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605284 + 366025 = 778^2 + 605^2 .

It is an emirp because it is prime and its reverse (903179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971309 - 2⁸ = 971053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485654 + 485655.

It is an arithmetic number, because the mean of its divisors is an integer number (485655).

2⁹⁷¹³⁰⁹ is an apocalyptic number.

It is an amenable number.

971309 is a deficient number, since it is larger than the sum of its proper divisors (1).

971309 is an equidigital number, since it uses as much as digits as its factorization.

971309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 971309 is about 985.5501001979. The cubic root of 971309 is about 99.0343383247.

The spelling of 971309 in words is "nine hundred seventy-one thousand, three hundred nine".