1982913681 has 16 divisors (see below), whose sum is σ = 3055536000. Its totient is φ = 1120361088.

The previous prime is 1982913679. The next prime is 1982913689. The reversal of 1982913681 is 1863192891.

It is not a de Polignac number, because 1982913681 - 2¹ = 1982913679 is a prime.

It is a super-2 number, since 2×1982913681² = 7863893332593939522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1982913681.

It is not an unprimeable number, because it can be changed into a prime (1982913689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528606 + ... + 532343.

It is an arithmetic number, because the mean of its divisors is an integer number (190971000).

Almost surely, 2^1982913681 is an apocalyptic number.

It is an amenable number.

1982913681 is a deficient number, since it is larger than the sum of its proper divisors (1072622319).

1982913681 is a wasteful number, since it uses less digits than its factorization.

1982913681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061048.

The product of its digits is 186624, while the sum is 48.

The square root of 1982913681 is about 44529.9189422123. The cubic root of 1982913681 is about 1256.3228816210.

The spelling of 1982913681 in words is "one billion, nine hundred eighty-two million, nine hundred thirteen thousand, six hundred eighty-one".