2774309 has 2 divisors, whose sum is σ = 2774310. Its totient is φ = 2774308.

The previous prime is 2774293. The next prime is 2774311. The reversal of 2774309 is 9034772.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2280100 + 494209 = 1510^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 2774309 - 2⁴ = 2774293 is a prime.

It is a Sophie Germain prime.

Together with 2774311, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2774339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387154 + 1387155.

It is an arithmetic number, because the mean of its divisors is an integer number (1387155).

2^2774309 is an apocalyptic number.

It is an amenable number.

2774309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2774309 is an equidigital number, since it uses as much as digits as its factorization.

2774309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 2774309 is about 1665.6257082550. The cubic root of 2774309 is about 140.5135729005.

The spelling of 2774309 in words is "two million, seven hundred seventy-four thousand, three hundred nine".