5820981 has 4 divisors (see below), whose sum is σ = 7761312. Its totient is φ = 3880652.

The previous prime is 5820977. The next prime is 5821003. The reversal of 5820981 is 1890285.

It is a happy number.

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 5820981 - 2² = 5820977 is a prime.

It is a super-2 number, since 2×5820981² = 67767639604722, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5820481) 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, 970161 + ... + 970166.

It is an arithmetic number, because the mean of its divisors is an integer number (1940328).

Almost surely, 2^5820981 is an apocalyptic number.

It is an amenable number.

5820981 is a deficient number, since it is larger than the sum of its proper divisors (1940331).

5820981 is a wasteful number, since it uses less digits than its factorization.

5820981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940330.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 5820981 is about 2412.6709265874. The cubic root of 5820981 is about 179.8865643305.

The spelling of 5820981 in words is "five million, eight hundred twenty thousand, nine hundred eighty-one".