857554189 has 4 divisors (see below), whose sum is σ = 902688640. Its totient is φ = 812419740.

The previous prime is 857554183. The next prime is 857554193. The reversal of 857554189 is 981455758.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857554189 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 (857554183) 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, 22567197 + ... + 22567234.

It is an arithmetic number, because the mean of its divisors is an integer number (225672160).

Almost surely, 2^857554189 is an apocalyptic number.

It is an amenable number.

857554189 is a deficient number, since it is larger than the sum of its proper divisors (45134451).

857554189 is a wasteful number, since it uses less digits than its factorization.

857554189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45134450.

The product of its digits is 2016000, while the sum is 52.

The square root of 857554189 is about 29284.0261746912. The cubic root of 857554189 is about 950.0661778460.

The spelling of 857554189 in words is "eight hundred fifty-seven million, five hundred fifty-four thousand, one hundred eighty-nine".