2781469 has 2 divisors, whose sum is σ = 2781470. Its totient is φ = 2781468.

The previous prime is 2781463. The next prime is 2781487. The reversal of 2781469 is 9641872.

2781469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2365444 + 416025 = 1538^2 + 645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2781469 is a prime.

It is a super-2 number, since 2×2781469² = 15473139595922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2781463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390734 + 1390735.

It is an arithmetic number, because the mean of its divisors is an integer number (1390735).

2^2781469 is an apocalyptic number.

It is an amenable number.

2781469 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781469 is an equidigital number, since it uses as much as digits as its factorization.

2781469 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2781469 is about 1667.7736656993. The cubic root of 2781469 is about 140.6343492714.

The spelling of 2781469 in words is "two million, seven hundred eighty-one thousand, four hundred sixty-nine".