2056857089 has 4 divisors (see below), whose sum is σ = 2350693824. Its totient is φ = 1763020356.

The previous prime is 2056857083. The next prime is 2056857091. The reversal of 2056857089 is 9807586502.

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 not a de Polignac number, because 2056857089 - 2⁴ = 2056857073 is a prime.

It is a super-2 number, since 2×2056857089² = 8461322169139107842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2056857083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146918357 + ... + 146918370.

It is an arithmetic number, because the mean of its divisors is an integer number (587673456).

Almost surely, 2^2056857089 is an apocalyptic number.

It is an amenable number.

2056857089 is a deficient number, since it is larger than the sum of its proper divisors (293836735).

2056857089 is an equidigital number, since it uses as much as digits as its factorization.

2056857089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293836734.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The square root of 2056857089 is about 45352.5863540328. The cubic root of 2056857089 is about 1271.7489057212.

The spelling of 2056857089 in words is "two billion, fifty-six million, eight hundred fifty-seven thousand, eighty-nine".