972644173 has 2 divisors, whose sum is σ = 972644174. Its totient is φ = 972644172.

The previous prime is 972644161. The next prime is 972644177. The reversal of 972644173 is 371446279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 796763529 + 175880644 = 28227^2 + 13262^2 .

It is an emirp because it is prime and its reverse (371446279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 972644173 - 2¹³ = 972635981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (972644177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486322086 + 486322087.

It is an arithmetic number, because the mean of its divisors is an integer number (486322087).

Almost surely, 2^972644173 is an apocalyptic number.

It is an amenable number.

972644173 is a deficient number, since it is larger than the sum of its proper divisors (1).

972644173 is an equidigital number, since it uses as much as digits as its factorization.

972644173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 972644173 is about 31187.2437544583. The cubic root of 972644173 is about 990.7969547792.

The spelling of 972644173 in words is "nine hundred seventy-two million, six hundred forty-four thousand, one hundred seventy-three".