971724997 has 2 divisors, whose sum is σ = 971724998. Its totient is φ = 971724996.

The previous prime is 971724991. The next prime is 971725021. The reversal of 971724997 is 799427179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 570684321 + 401040676 = 23889^2 + 20026^2 .

It is a cyclic number.

It is not a de Polignac number, because 971724997 - 2¹¹ = 971722949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971724991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485862498 + 485862499.

It is an arithmetic number, because the mean of its divisors is an integer number (485862499).

Almost surely, 2^971724997 is an apocalyptic number.

It is an amenable number.

971724997 is a deficient number, since it is larger than the sum of its proper divisors (1).

971724997 is an equidigital number, since it uses as much as digits as its factorization.

971724997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000376, while the sum is 55.

The square root of 971724997 is about 31172.5038615765. The cubic root of 971724997 is about 990.4847461140.

The spelling of 971724997 in words is "nine hundred seventy-one million, seven hundred twenty-four thousand, nine hundred ninety-seven".