5680821 has 4 divisors (see below), whose sum is σ = 7574432. Its totient is φ = 3787212.

The previous prime is 5680813. The next prime is 5680823. The reversal of 5680821 is 1280865.

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 not a de Polignac number, because 5680821 - 2³ = 5680813 is a prime.

It is a D-number.

It is a Duffinian number.

5680821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5680823) 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, 946801 + ... + 946806.

It is an arithmetic number, because the mean of its divisors is an integer number (1893608).

Almost surely, 2^5680821 is an apocalyptic number.

It is an amenable number.

5680821 is a deficient number, since it is larger than the sum of its proper divisors (1893611).

5680821 is a wasteful number, since it uses less digits than its factorization.

5680821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893610.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 5680821 is about 2383.4472933128. The cubic root of 5680821 is about 178.4310242016.

The spelling of 5680821 in words is "five million, six hundred eighty thousand, eight hundred twenty-one".