972647773 has 2 divisors, whose sum is σ = 972647774. Its totient is φ = 972647772.

The previous prime is 972647743. The next prime is 972647783. The reversal of 972647773 is 377746279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490976964 + 481670809 = 22158^2 + 21947^2 .

It is an emirp because it is prime and its reverse (377746279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 972647773 - 2⁹ = 972647261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 972647773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (972647743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486323886 + 486323887.

It is an arithmetic number, because the mean of its divisors is an integer number (486323887).

Almost surely, 2^972647773 is an apocalyptic number.

It is an amenable number.

972647773 is a deficient number, since it is larger than the sum of its proper divisors (1).

972647773 is an equidigital number, since it uses as much as digits as its factorization.

972647773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3111696, while the sum is 52.

The square root of 972647773 is about 31187.3014703100. The cubic root of 972647773 is about 990.7981771737.

The spelling of 972647773 in words is "nine hundred seventy-two million, six hundred forty-seven thousand, seven hundred seventy-three".