2779140823 has 2 divisors, whose sum is σ = 2779140824. Its totient is φ = 2779140822.

The previous prime is 2779140809. The next prime is 2779140827. The reversal of 2779140823 is 3280419772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2779140823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2779140823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2779140827) 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 as a sum of consecutive naturals, namely, 1389570411 + 1389570412.

It is an arithmetic number, because the mean of its divisors is an integer number (1389570412).

Almost surely, 2^2779140823 is an apocalyptic number.

2779140823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2779140823 is an equidigital number, since it uses as much as digits as its factorization.

2779140823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 2779140823 is about 52717.5570659339. The cubic root of 2779140823 is about 1405.9509986113.

The spelling of 2779140823 in words is "two billion, seven hundred seventy-nine million, one hundred forty thousand, eight hundred twenty-three".