1992810681 has 24 divisors (see below), whose sum is σ = 3029694304. Its totient is φ = 1308700800.

The previous prime is 1992810679. The next prime is 1992810697. The reversal of 1992810681 is 1860182991.

It is not a de Polignac number, because 1992810681 - 2¹ = 1992810679 is a prime.

It is a super-2 number, since 2×1992810681² = 7942588820615367522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1992810671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44920 + ... + 77481.

Almost surely, 2^1992810681 is an apocalyptic number.

It is an amenable number.

1992810681 is a deficient number, since it is larger than the sum of its proper divisors (1036883623).

1992810681 is an equidigital number, since it uses as much as digits as its factorization.

1992810681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122483 (or 122471 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The square root of 1992810681 is about 44640.9081560848. The cubic root of 1992810681 is about 1258.4095749759.

The spelling of 1992810681 in words is "one billion, nine hundred ninety-two million, eight hundred ten thousand, six hundred eighty-one".