2749786987 has 4 divisors (see below), whose sum is σ = 2780683560. Its totient is φ = 2718890416.

The previous prime is 2749786967. The next prime is 2749787041. The reversal of 2749786987 is 7896879472.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2749786987 - 2²⁷ = 2615569259 is a prime.

It is a super-2 number, since 2×2749786987² = 15122656947749076338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2749786957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15448153 + ... + 15448330.

It is an arithmetic number, because the mean of its divisors is an integer number (695170890).

Almost surely, 2^2749786987 is an apocalyptic number.

2749786987 is a deficient number, since it is larger than the sum of its proper divisors (30896573).

2749786987 is an equidigital number, since it uses as much as digits as its factorization.

2749786987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30896572.

The product of its digits is 85349376, while the sum is 67.

The square root of 2749786987 is about 52438.4113699109. The cubic root of 2749786987 is about 1400.9834904055.

The spelling of 2749786987 in words is "two billion, seven hundred forty-nine million, seven hundred eighty-six thousand, nine hundred eighty-seven".