1982829621 has 4 divisors (see below), whose sum is σ = 2643772832. Its totient is φ = 1321886412.

The previous prime is 1982829613. The next prime is 1982829623. The reversal of 1982829621 is 1269282891.

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 1982829621 - 2³ = 1982829613 is a prime.

It is a super-2 number, since 2×1982829621² = 7863226611830007282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982829623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330471601 + ... + 330471606.

It is an arithmetic number, because the mean of its divisors is an integer number (660943208).

Almost surely, 2^1982829621 is an apocalyptic number.

It is an amenable number.

1982829621 is a deficient number, since it is larger than the sum of its proper divisors (660943211).

1982829621 is an equidigital number, since it uses as much as digits as its factorization.

1982829621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660943210.

The product of its digits is 248832, while the sum is 48.

The square root of 1982829621 is about 44528.9750724177. The cubic root of 1982829621 is about 1256.3051286220.

The spelling of 1982829621 in words is "one billion, nine hundred eighty-two million, eight hundred twenty-nine thousand, six hundred twenty-one".