971549 has 2 divisors, whose sum is σ = 971550. Its totient is φ = 971548.

The previous prime is 971521. The next prime is 971561. The reversal of 971549 is 945179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 964324 + 7225 = 982^2 + 85^2 .

It is an emirp because it is prime and its reverse (945179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971549 - 2¹⁶ = 906013 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 (971569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485774 + 485775.

It is an arithmetic number, because the mean of its divisors is an integer number (485775).

2⁹⁷¹⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

971549 is a deficient number, since it is larger than the sum of its proper divisors (1).

971549 is an equidigital number, since it uses as much as digits as its factorization.

971549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 35.

The square root of 971549 is about 985.6718520887. The cubic root of 971549 is about 99.0424944260.

The spelling of 971549 in words is "nine hundred seventy-one thousand, five hundred forty-nine".