871173397 has 2 divisors, whose sum is σ = 871173398. Its totient is φ = 871173396.

The previous prime is 871173353. The next prime is 871173419. The reversal of 871173397 is 793371178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 577873521 + 293299876 = 24039^2 + 17126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871173397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871173097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435586698 + 435586699.

It is an arithmetic number, because the mean of its divisors is an integer number (435586699).

Almost surely, 2^871173397 is an apocalyptic number.

It is an amenable number.

871173397 is a deficient number, since it is larger than the sum of its proper divisors (1).

871173397 is an equidigital number, since it uses as much as digits as its factorization.

871173397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 46.

The square root of 871173397 is about 29515.6466471599. The cubic root of 871173397 is about 955.0692628145.

The spelling of 871173397 in words is "eight hundred seventy-one million, one hundred seventy-three thousand, three hundred ninety-seven".