971189473 has 2 divisors, whose sum is σ = 971189474. Its totient is φ = 971189472.

The previous prime is 971189441. The next prime is 971189507. The reversal of 971189473 is 374981179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 790340769 + 180848704 = 28113^2 + 13448^2 .

It is a cyclic number.

It is not a de Polignac number, because 971189473 - 2⁵ = 971189441 is a prime.

It is not a weakly prime, because it can be changed into another prime (971189773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485594736 + 485594737.

It is an arithmetic number, because the mean of its divisors is an integer number (485594737).

Almost surely, 2^971189473 is an apocalyptic number.

It is an amenable number.

971189473 is a deficient number, since it is larger than the sum of its proper divisors (1).

971189473 is an equidigital number, since it uses as much as digits as its factorization.

971189473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 49.

The square root of 971189473 is about 31163.9129924341. The cubic root of 971189473 is about 990.3027584716.

The spelling of 971189473 in words is "nine hundred seventy-one million, one hundred eighty-nine thousand, four hundred seventy-three".