5599681 has 4 divisors (see below), whose sum is σ = 5929092. Its totient is φ = 5270272.

The previous prime is 5599679. The next prime is 5599687. The reversal of 5599681 is 1869955.

It is a happy number.

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 5022081 + 577600 = 2241^2 + 760^2 .

It is not a de Polignac number, because 5599681 - 2¹ = 5599679 is a prime.

It is a super-2 number, since 2×5599681² = 62712854603522, which contains 22 as substring.

It is a Duffinian number.

5599681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5599687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164680 + ... + 164713.

It is an arithmetic number, because the mean of its divisors is an integer number (1482273).

Almost surely, 2^5599681 is an apocalyptic number.

It is an amenable number.

5599681 is a deficient number, since it is larger than the sum of its proper divisors (329411).

5599681 is a wasteful number, since it uses less digits than its factorization.

5599681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329410.

The product of its digits is 97200, while the sum is 43.

The square root of 5599681 is about 2366.3645112281. The cubic root of 5599681 is about 177.5774283633.

The spelling of 5599681 in words is "five million, five hundred ninety-nine thousand, six hundred eighty-one".