2781073 has 2 divisors, whose sum is σ = 2781074. Its totient is φ = 2781072.

The previous prime is 2781067. The next prime is 2781089. The reversal of 2781073 is 3701872.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2663424 + 117649 = 1632^2 + 343^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781073 - 2¹³ = 2772881 is a prime.

2781073 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2787073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390536 + 1390537.

It is an arithmetic number, because the mean of its divisors is an integer number (1390537).

2^2781073 is an apocalyptic number.

It is an amenable number.

2781073 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781073 is an equidigital number, since it uses as much as digits as its factorization.

2781073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 2781073 is about 1667.6549403279. The cubic root of 2781073 is about 140.6276748792.

The spelling of 2781073 in words is "two million, seven hundred eighty-one thousand, seventy-three".