5981027821 has 4 divisors (see below), whose sum is σ = 5986666044. Its totient is φ = 5975389600.

The previous prime is 5981027791. The next prime is 5981027851. The reversal of 5981027821 is 1287201895.

It is a happy number.

5981027821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5981027791) and next prime (5981027851).

It can be written as a sum of positive squares in 2 ways, for example, as 3028300900 + 2952726921 = 55030^2 + 54339^2 .

It is a cyclic number.

It is not a de Polignac number, because 5981027821 - 2²¹ = 5978930669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5981027851) 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, 2817520 + ... + 2819641.

It is an arithmetic number, because the mean of its divisors is an integer number (1496666511).

Almost surely, 2^5981027821 is an apocalyptic number.

It is an amenable number.

5981027821 is a deficient number, since it is larger than the sum of its proper divisors (5638223).

5981027821 is a wasteful number, since it uses less digits than its factorization.

5981027821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5638222.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 5981027821 is about 77337.1050725329. The cubic root of 5981027821 is about 1815.2033073969.

The spelling of 5981027821 in words is "five billion, nine hundred eighty-one million, twenty-seven thousand, eight hundred twenty-one".