971622173 has 2 divisors, whose sum is σ = 971622174. Its totient is φ = 971622172.

The previous prime is 971622139. The next prime is 971622187. The reversal of 971622173 is 371226179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614147524 + 357474649 = 24782^2 + 18907^2 .

It is an emirp because it is prime and its reverse (371226179) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971622173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971622103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485811086 + 485811087.

It is an arithmetic number, because the mean of its divisors is an integer number (485811087).

Almost surely, 2^971622173 is an apocalyptic number.

It is an amenable number.

971622173 is a deficient number, since it is larger than the sum of its proper divisors (1).

971622173 is an equidigital number, since it uses as much as digits as its factorization.

971622173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 971622173 is about 31170.8545439486. The cubic root of 971622173 is about 990.4498085215.

The spelling of 971622173 in words is "nine hundred seventy-one million, six hundred twenty-two thousand, one hundred seventy-three".