9871435253 has 2 divisors, whose sum is σ = 9871435254. Its totient is φ = 9871435252.

The previous prime is 9871435247. The next prime is 9871435319. The reversal of 9871435253 is 3525341789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9427827409 + 443607844 = 97097^2 + 21062^2 .

It is a cyclic number.

It is not a de Polignac number, because 9871435253 - 2¹⁰ = 9871434229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9871435198 and 9871435207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9871435213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4935717626 + 4935717627.

It is an arithmetic number, because the mean of its divisors is an integer number (4935717627).

Almost surely, 2^9871435253 is an apocalyptic number.

It is an amenable number.

9871435253 is a deficient number, since it is larger than the sum of its proper divisors (1).

9871435253 is an equidigital number, since it uses as much as digits as its factorization.

9871435253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 9871435253 is about 99355.0967640815. The cubic root of 9871435253 is about 2145.1620261472.

The spelling of 9871435253 in words is "nine billion, eight hundred seventy-one million, four hundred thirty-five thousand, two hundred fifty-three".