857563361 has 4 divisors (see below), whose sum is σ = 857625792. Its totient is φ = 857500932.

The previous prime is 857563331. The next prime is 857563367. The reversal of 857563361 is 163365758.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 857563361 - 2²² = 853369057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857563367) 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, 605 + ... + 41418.

It is an arithmetic number, because the mean of its divisors is an integer number (214406448).

Almost surely, 2^857563361 is an apocalyptic number.

It is an amenable number.

857563361 is a deficient number, since it is larger than the sum of its proper divisors (62431).

857563361 is a wasteful number, since it uses less digits than its factorization.

857563361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62430.

The product of its digits is 453600, while the sum is 44.

The square root of 857563361 is about 29284.1827784215. The cubic root of 857563361 is about 950.0695649890.

The spelling of 857563361 in words is "eight hundred fifty-seven million, five hundred sixty-three thousand, three hundred sixty-one".