972881317 has 4 divisors (see below), whose sum is σ = 972946156. Its totient is φ = 972816480.

The previous prime is 972881279. The next prime is 972881359. The reversal of 972881317 is 713188279.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 713188279 = 16903 ⋅42193.

It can be written as a sum of positive squares in 2 ways, for example, as 281769796 + 691111521 = 16786^2 + 26289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972881317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972881017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2953 + ... + 44209.

It is an arithmetic number, because the mean of its divisors is an integer number (243236539).

Almost surely, 2^972881317 is an apocalyptic number.

It is an amenable number.

972881317 is a deficient number, since it is larger than the sum of its proper divisors (64839).

972881317 is a wasteful number, since it uses less digits than its factorization.

972881317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64838.

The product of its digits is 169344, while the sum is 46.

The square root of 972881317 is about 31191.0454617988. The cubic root of 972881317 is about 990.8774715349.

The spelling of 972881317 in words is "nine hundred seventy-two million, eight hundred eighty-one thousand, three hundred seventeen".