2086881991 has 8 divisors (see below), whose sum is σ = 2105691120. Its totient is φ = 2068146432.

The previous prime is 2086881983. The next prime is 2086882019. The reversal of 2086881991 is 1991886802.

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 2086881991 - 2³ = 2086881983 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 (2086881911) 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 7 ways as a sum of consecutive naturals, for example, 39405 + ... + 75673.

It is an arithmetic number, because the mean of its divisors is an integer number (263211390).

Almost surely, 2^2086881991 is an apocalyptic number.

2086881991 is a deficient number, since it is larger than the sum of its proper divisors (18809129).

2086881991 is a wasteful number, since it uses less digits than its factorization.

2086881991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36785.

The product of its (nonzero) digits is 497664, while the sum is 52.

The square root of 2086881991 is about 45682.4035160148. The cubic root of 2086881991 is about 1277.9071412649.

The spelling of 2086881991 in words is "two billion, eighty-six million, eight hundred eighty-one thousand, nine hundred ninety-one".