871647253 has 2 divisors, whose sum is σ = 871647254. Its totient is φ = 871647252.

The previous prime is 871647209. The next prime is 871647277. The reversal of 871647253 is 352746178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 710915569 + 160731684 = 26663^2 + 12678^2 .

It is a cyclic number.

It is not a de Polignac number, because 871647253 - 2¹⁷ = 871516181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871647653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435823626 + 435823627.

It is an arithmetic number, because the mean of its divisors is an integer number (435823627).

Almost surely, 2^871647253 is an apocalyptic number.

It is an amenable number.

871647253 is a deficient number, since it is larger than the sum of its proper divisors (1).

871647253 is an equidigital number, since it uses as much as digits as its factorization.

871647253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 43.

The square root of 871647253 is about 29523.6727559428. The cubic root of 871647253 is about 955.2423945441.

The spelling of 871647253 in words is "eight hundred seventy-one million, six hundred forty-seven thousand, two hundred fifty-three".