5816921 has 4 divisors (see below), whose sum is σ = 6345744. Its totient is φ = 5288100.

The previous prime is 5816917. The next prime is 5816927. The reversal of 5816921 is 1296185.

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 5816921 - 2² = 5816917 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5816927) 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, 264395 + ... + 264416.

It is an arithmetic number, because the mean of its divisors is an integer number (1586436).

Almost surely, 2^5816921 is an apocalyptic number.

It is an amenable number.

5816921 is a deficient number, since it is larger than the sum of its proper divisors (528823).

5816921 is a wasteful number, since it uses less digits than its factorization.

5816921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528822.

The product of its digits is 4320, while the sum is 32.

The square root of 5816921 is about 2411.8293886592. The cubic root of 5816921 is about 179.8447323601.

The spelling of 5816921 in words is "five million, eight hundred sixteen thousand, nine hundred twenty-one".