2687930681 has 8 divisors (see below), whose sum is σ = 2754756480. Its totient is φ = 2621925072.

The previous prime is 2687930659. The next prime is 2687930683. The reversal of 2687930681 is 1860397862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2687930681 - 2⁶ = 2687930617 is a prime.

It is a super-2 number, since 2×2687930681² = 14449942691722247522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2687930683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198410 + ... + 211523.

It is an arithmetic number, because the mean of its divisors is an integer number (344344560).

Almost surely, 2^2687930681 is an apocalyptic number.

It is an amenable number.

2687930681 is a deficient number, since it is larger than the sum of its proper divisors (66825799).

2687930681 is an equidigital number, since it uses as much as digits as its factorization.

2687930681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410095.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 2687930681 is about 51845.2570733331. The cubic root of 2687930681 is about 1390.3987057342.

The spelling of 2687930681 in words is "two billion, six hundred eighty-seven million, nine hundred thirty thousand, six hundred eighty-one".