971825319677 has 2 divisors, whose sum is σ = 971825319678. Its totient is φ = 971825319676.

The previous prime is 971825319659. The next prime is 971825319719. The reversal of 971825319677 is 776913528179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 971291062681 + 534256996 = 985541^2 + 23114^2 .

It is an emirp because it is prime and its reverse (776913528179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971825319677 - 2¹² = 971825315581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971825319077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485912659838 + 485912659839.

It is an arithmetic number, because the mean of its divisors is an integer number (485912659839).

Almost surely, 2^971825319677 is an apocalyptic number.

It is an amenable number.

971825319677 is a deficient number, since it is larger than the sum of its proper divisors (1).

971825319677 is an equidigital number, since it uses as much as digits as its factorization.

971825319677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40007520, while the sum is 65.

The spelling of 971825319677 in words is "nine hundred seventy-one billion, eight hundred twenty-five million, three hundred nineteen thousand, six hundred seventy-seven".