1982527721 has 8 divisors (see below), whose sum is σ = 1988763840. Its totient is φ = 1976301712.

The previous prime is 1982527691. The next prime is 1982527753. The reversal of 1982527721 is 1277252891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1982527721 - 2¹⁰ = 1982526697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1982527121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583295 + ... + 586683.

It is an arithmetic number, because the mean of its divisors is an integer number (248595480).

Almost surely, 2^1982527721 is an apocalyptic number.

It is an amenable number.

1982527721 is a deficient number, since it is larger than the sum of its proper divisors (6236119).

1982527721 is a wasteful number, since it uses less digits than its factorization.

1982527721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055.

The product of its digits is 141120, while the sum is 44.

The square root of 1982527721 is about 44525.5850158086. The cubic root of 1982527721 is about 1256.2413649036.

The spelling of 1982527721 in words is "one billion, nine hundred eighty-two million, five hundred twenty-seven thousand, seven hundred twenty-one".