1982777769 has 12 divisors (see below), whose sum is σ = 3273157056. Its totient is φ = 1133015832.

The previous prime is 1982777729. The next prime is 1982777789. The reversal of 1982777769 is 9677772891.

It is not a de Polignac number, because 1982777769 - 2⁸ = 1982777513 is a prime.

It is a super-2 number, since 2×1982777769² = 7862815362481234722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 31472663 = 1982777769 / (1 + 9 + 8 + 2 + 7 + 7 + 7 + 7 + 6 + 9).

It is not an unprimeable number, because it can be changed into a prime (1982777729) 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 11 ways as a sum of consecutive naturals, for example, 15736269 + ... + 15736394.

It is an arithmetic number, because the mean of its divisors is an integer number (272763088).

Almost surely, 2^1982777769 is an apocalyptic number.

It is an amenable number.

1982777769 is a deficient number, since it is larger than the sum of its proper divisors (1290379287).

1982777769 is a wasteful number, since it uses less digits than its factorization.

1982777769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31472676 (or 31472673 counting only the distinct ones).

The product of its digits is 18670176, while the sum is 63.

The square root of 1982777769 is about 44528.3928409728. The cubic root of 1982777769 is about 1256.2941775212.

The spelling of 1982777769 in words is "one billion, nine hundred eighty-two million, seven hundred seventy-seven thousand, seven hundred sixty-nine".