1982814663 has 4 divisors (see below), whose sum is σ = 2643752888. Its totient is φ = 1321876440.

The previous prime is 1982814619. The next prime is 1982814697. The reversal of 1982814663 is 3664182891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3664182891 = 3 ⋅1221394297.

It is not a de Polignac number, because 1982814663 - 2¹⁰ = 1982813639 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 (1982814263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330469108 + ... + 330469113.

It is an arithmetic number, because the mean of its divisors is an integer number (660938222).

Almost surely, 2^1982814663 is an apocalyptic number.

1982814663 is a deficient number, since it is larger than the sum of its proper divisors (660938225).

1982814663 is an equidigital number, since it uses as much as digits as its factorization.

1982814663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660938224.

The product of its digits is 497664, while the sum is 48.

The square root of 1982814663 is about 44528.8071140470. The cubic root of 1982814663 is about 1256.3019695240.

The spelling of 1982814663 in words is "one billion, nine hundred eighty-two million, eight hundred fourteen thousand, six hundred sixty-three".