997375675577 has 2 divisors, whose sum is σ = 997375675578. Its totient is φ = 997375675576.

The previous prime is 997375675547. The next prime is 997375675601. The reversal of 997375675577 is 775576573799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722124348841 + 275251326736 = 849779^2 + 524644^2 .

It is a cyclic number.

It is not a de Polignac number, because 997375675577 - 2¹⁶ = 997375610041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997375675498 and 997375675507.

It is not a weakly prime, because it can be changed into another prime (997375675537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498687837788 + 498687837789.

It is an arithmetic number, because the mean of its divisors is an integer number (498687837789).

Almost surely, 2^997375675577 is an apocalyptic number.

It is an amenable number.

997375675577 is a deficient number, since it is larger than the sum of its proper divisors (1).

997375675577 is an equidigital number, since it uses as much as digits as its factorization.

997375675577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3063075750, while the sum is 77.

The spelling of 997375675577 in words is "nine hundred ninety-seven billion, three hundred seventy-five million, six hundred seventy-five thousand, five hundred seventy-seven".