2749802089 has 4 divisors (see below), whose sum is σ = 2750279824. Its totient is φ = 2749324356.

The previous prime is 2749802057. The next prime is 2749802123. The reversal of 2749802089 is 9802089472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a 6-Lehmer number, since φ(2749802089) divides (2749802089-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 2749802089 - 2⁵ = 2749802057 is a prime.

It is a super-2 number, since 2×2749802089² = 15122823057337527842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2749800089) 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 3 ways as a sum of consecutive naturals, for example, 230127 + ... + 241780.

It is an arithmetic number, because the mean of its divisors is an integer number (687569956).

Almost surely, 2^2749802089 is an apocalyptic number.

It is an amenable number.

2749802089 is a deficient number, since it is larger than the sum of its proper divisors (477735).

2749802089 is an equidigital number, since it uses as much as digits as its factorization.

2749802089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477734.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 2749802089 is about 52438.5553672105. Note that the first 3 decimals coincide. The cubic root of 2749802089 is about 1400.9860551635.

The spelling of 2749802089 in words is "two billion, seven hundred forty-nine million, eight hundred two thousand, eighty-nine".