8470871657 has 4 divisors (see below), whose sum is σ = 8483687556. Its totient is φ = 8458055760.

The previous prime is 8470871623. The next prime is 8470871663. The reversal of 8470871657 is 7561780748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3408691456 + 5062180201 = 58384^2 + 71149^2 .

It is a cyclic number.

It is not a de Polignac number, because 8470871657 - 2¹⁰ = 8470870633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8470871599 and 8470871608.

It is not an unprimeable number, because it can be changed into a prime (8470871677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6406958 + ... + 6408279.

It is an arithmetic number, because the mean of its divisors is an integer number (2120921889).

Almost surely, 2^8470871657 is an apocalyptic number.

It is an amenable number.

8470871657 is a deficient number, since it is larger than the sum of its proper divisors (12815899).

8470871657 is a wasteful number, since it uses less digits than its factorization.

8470871657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12815898.

The product of its (nonzero) digits is 2634240, while the sum is 53.

The square root of 8470871657 is about 92037.3383850272. The cubic root of 8470871657 is about 2038.4936702196.

Subtracting from 8470871657 its reverse (7561780748), we obtain a palindrome (909090909).

The spelling of 8470871657 in words is "eight billion, four hundred seventy million, eight hundred seventy-one thousand, six hundred fifty-seven".