971506573 has 2 divisors, whose sum is σ = 971506574. Its totient is φ = 971506572.

The previous prime is 971506553. The next prime is 971506579. The reversal of 971506573 is 375605179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766071684 + 205434889 = 27678^2 + 14333^2 .

It is an emirp because it is prime and its reverse (375605179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971506573 - 2²⁹ = 434635661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971506579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485753286 + 485753287.

It is an arithmetic number, because the mean of its divisors is an integer number (485753287).

Almost surely, 2^971506573 is an apocalyptic number.

It is an amenable number.

971506573 is a deficient number, since it is larger than the sum of its proper divisors (1).

971506573 is an equidigital number, since it uses as much as digits as its factorization.

971506573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 198450, while the sum is 43.

The square root of 971506573 is about 31169.0001924990. Note that the first 3 decimals coincide. The cubic root of 971506573 is about 990.4105269495.

The spelling of 971506573 in words is "nine hundred seventy-one million, five hundred six thousand, five hundred seventy-three".