2738809 has 2 divisors, whose sum is σ = 2738810. Its totient is φ = 2738808.

The previous prime is 2738803. The next prime is 2738821. The reversal of 2738809 is 9088372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2732409 + 6400 = 1653^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 2738809 - 2¹⁹ = 2214521 is a prime.

It is not a weakly prime, because it can be changed into another prime (2738803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1369404 + 1369405.

It is an arithmetic number, because the mean of its divisors is an integer number (1369405).

2^2738809 is an apocalyptic number.

It is an amenable number.

2738809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2738809 is an equidigital number, since it uses as much as digits as its factorization.

2738809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 2738809 is about 1654.9347419158. The cubic root of 2738809 is about 139.9116619587.

The spelling of 2738809 in words is "two million, seven hundred thirty-eight thousand, eight hundred nine".