871091253 has 10 divisors (see below), whose sum is σ = 1301259894. Its totient is φ = 580727448.

The previous prime is 871091239. The next prime is 871091269. The reversal of 871091253 is 352190178.

It can be written as a sum of positive squares in only one way, i.e., 861892164 + 9199089 = 29358^2 + 3033^2 .

It is not a de Polignac number, because 871091253 - 2⁶ = 871091189 is a prime.

It is a super-2 number, since 2×871091253² = 1517599942106220018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871091153) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5377026 + ... + 5377187.

Almost surely, 2^871091253 is an apocalyptic number.

It is an amenable number.

871091253 is a deficient number, since it is larger than the sum of its proper divisors (430168641).

871091253 is a wasteful number, since it uses less digits than its factorization.

871091253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10754225 (or 10754216 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 871091253 is about 29514.2550812315. The cubic root of 871091253 is about 955.0392436566.

The spelling of 871091253 in words is "eight hundred seventy-one million, ninety-one thousand, two hundred fifty-three".