2781497 has 2 divisors, whose sum is σ = 2781498. Its totient is φ = 2781496.

The previous prime is 2781491. The next prime is 2781503. The reversal of 2781497 is 7941872.

2781497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (2781491) and next prime (2781503).

It can be written as a sum of positive squares in only one way, i.e., 2725801 + 55696 = 1651^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781497 - 2⁶ = 2781433 is a prime.

It is a super-2 number, since 2×2781497² = 15473451122018, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2781497.

It is not a weakly prime, because it can be changed into another prime (2781491) 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, 1390748 + 1390749.

It is an arithmetic number, because the mean of its divisors is an integer number (1390749).

2^2781497 is an apocalyptic number.

It is an amenable number.

2781497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781497 is an equidigital number, since it uses as much as digits as its factorization.

2781497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 2781497 is about 1667.7820601026. The cubic root of 2781497 is about 140.6348211742.

The spelling of 2781497 in words is "two million, seven hundred eighty-one thousand, four hundred ninety-seven".