2778731341 has 4 divisors (see below), whose sum is σ = 2779674012. Its totient is φ = 2777788672.

The previous prime is 2778731303. The next prime is 2778731383. The reversal of 2778731341 is 1431378772.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1807100100 + 971631241 = 42510^2 + 31171^2 .

It is a cyclic number.

It is not a de Polignac number, because 2778731341 - 2¹⁷ = 2778600269 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 (2778738341) 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 3 ways as a sum of consecutive naturals, for example, 466900 + ... + 472813.

It is an arithmetic number, because the mean of its divisors is an integer number (694918503).

Almost surely, 2^2778731341 is an apocalyptic number.

It is an amenable number.

2778731341 is a deficient number, since it is larger than the sum of its proper divisors (942671).

2778731341 is an equidigital number, since it uses as much as digits as its factorization.

2778731341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942670.

The product of its digits is 197568, while the sum is 43.

The square root of 2778731341 is about 52713.6731882725. The cubic root of 2778731341 is about 1405.8819437077.

The spelling of 2778731341 in words is "two billion, seven hundred seventy-eight million, seven hundred thirty-one thousand, three hundred forty-one".