2817779 has 2 divisors, whose sum is σ = 2817780. Its totient is φ = 2817778.

The previous prime is 2817769. The next prime is 2817797. The reversal of 2817779 is 9777182.

Together with next prime (2817797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2817779 - 2¹² = 2813683 is a prime.

It is not a weakly prime, because it can be changed into another prime (2817709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1408889 + 1408890.

It is an arithmetic number, because the mean of its divisors is an integer number (1408890).

2^2817779 is an apocalyptic number.

2817779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2817779 is an equidigital number, since it uses as much as digits as its factorization.

2817779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 41.

The square root of 2817779 is about 1678.6241389900. The cubic root of 2817779 is about 141.2436643202.

The spelling of 2817779 in words is "two million, eight hundred seventeen thousand, seven hundred seventy-nine".