1056654817 has 4 divisors (see below), whose sum is σ = 1093091220. Its totient is φ = 1020218416.

The previous prime is 1056654811. The next prime is 1056654827. The reversal of 1056654817 is 7184566501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 419799121 + 636855696 = 20489^2 + 25236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1056654817 is a prime.

It is a super-2 number, since 2×1056654817² = 2233038804578606978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056654811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18218158 + ... + 18218215.

It is an arithmetic number, because the mean of its divisors is an integer number (273272805).

Almost surely, 2^1056654817 is an apocalyptic number.

It is an amenable number.

1056654817 is a deficient number, since it is larger than the sum of its proper divisors (36436403).

1056654817 is an equidigital number, since it uses as much as digits as its factorization.

1056654817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36436402.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 1056654817 is about 32506.2273572311. The cubic root of 1056654817 is about 1018.5391162125.

The spelling of 1056654817 in words is "one billion, fifty-six million, six hundred fifty-four thousand, eight hundred seventeen".