2791409 has 2 divisors, whose sum is σ = 2791410. Its totient is φ = 2791408.

The previous prime is 2791387. The next prime is 2791429. The reversal of 2791409 is 9041972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 183184 = 1615^2 + 428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2791409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2791429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1395704 + 1395705.

It is an arithmetic number, because the mean of its divisors is an integer number (1395705).

2^2791409 is an apocalyptic number.

It is an amenable number.

2791409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2791409 is an equidigital number, since it uses as much as digits as its factorization.

2791409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 2791409 is about 1670.7510287293. The cubic root of 2791409 is about 140.8016761433.

The spelling of 2791409 in words is "two million, seven hundred ninety-one thousand, four hundred nine".