854642857 has 4 divisors (see below), whose sum is σ = 899624080. Its totient is φ = 809661636.

The previous prime is 854642851. The next prime is 854642863. The reversal of 854642857 is 758246458.

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: 758246458 = 2 ⋅379123229.

It is an interprime number because it is at equal distance from previous prime (854642851) and next prime (854642863).

It is a cyclic number.

It is not a de Polignac number, because 854642857 - 2³ = 854642849 is a prime.

It is a super-2 number, since 2×854642857² = 1460828826042244898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 854642857.

It is not an unprimeable number, because it can be changed into a prime (854642851) 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, 22490583 + ... + 22490620.

It is an arithmetic number, because the mean of its divisors is an integer number (224906020).

Almost surely, 2^854642857 is an apocalyptic number.

It is an amenable number.

854642857 is a deficient number, since it is larger than the sum of its proper divisors (44981223).

854642857 is a wasteful number, since it uses less digits than its factorization.

854642857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44981222.

The product of its digits is 2150400, while the sum is 49.

The square root of 854642857 is about 29234.2753801082. The cubic root of 854642857 is about 948.9898244636.

The spelling of 854642857 in words is "eight hundred fifty-four million, six hundred forty-two thousand, eight hundred fifty-seven".