5687645 has 4 divisors (see below), whose sum is σ = 6825180. Its totient is φ = 4550112.

The previous prime is 5687609. The next prime is 5687651. The reversal of 5687645 is 5467865.

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 1643524 + 4044121 = 1282^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 5687645 - 2⁸ = 5687389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 568760 + ... + 568769.

It is an arithmetic number, because the mean of its divisors is an integer number (1706295).

Almost surely, 2^5687645 is an apocalyptic number.

It is an amenable number.

5687645 is a deficient number, since it is larger than the sum of its proper divisors (1137535).

5687645 is a wasteful number, since it uses less digits than its factorization.

5687645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137534.

The product of its digits is 201600, while the sum is 41.

The square root of 5687645 is about 2384.8784036089. The cubic root of 5687645 is about 178.5024414661.

The spelling of 5687645 in words is "five million, six hundred eighty-seven thousand, six hundred forty-five".