27780773 has 2 divisors, whose sum is σ = 27780774. Its totient is φ = 27780772.

The previous prime is 27780769. The next prime is 27780787. The reversal of 27780773 is 37708772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21836929 + 5943844 = 4673^2 + 2438^2 .

It is a cyclic number.

It is not a de Polignac number, because 27780773 - 2² = 27780769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27780773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27780733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13890386 + 13890387.

It is an arithmetic number, because the mean of its divisors is an integer number (13890387).

Almost surely, 2^27780773 is an apocalyptic number.

It is an amenable number.

27780773 is a deficient number, since it is larger than the sum of its proper divisors (1).

27780773 is an equidigital number, since it uses as much as digits as its factorization.

27780773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115248, while the sum is 41.

The square root of 27780773 is about 5270.7469110175. The cubic root of 27780773 is about 302.8643171074.

The spelling of 27780773 in words is "twenty-seven million, seven hundred eighty thousand, seven hundred seventy-three".