857130653 has 4 divisors (see below), whose sum is σ = 877063968. Its totient is φ = 837197340.

The previous prime is 857130623. The next prime is 857130691. The reversal of 857130653 is 356031758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 356031758 = 2 ⋅178015879.

It is a cyclic number.

It is not a de Polignac number, because 857130653 - 2²⁰ = 856082077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857130623) 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, 9966593 + ... + 9966678.

It is an arithmetic number, because the mean of its divisors is an integer number (219265992).

Almost surely, 2^857130653 is an apocalyptic number.

It is an amenable number.

857130653 is a deficient number, since it is larger than the sum of its proper divisors (19933315).

857130653 is a wasteful number, since it uses less digits than its factorization.

857130653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19933314.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 857130653 is about 29276.7937622958. The cubic root of 857130653 is about 949.9097432258.

The spelling of 857130653 in words is "eight hundred fifty-seven million, one hundred thirty thousand, six hundred fifty-three".