2782760521 has 2 divisors, whose sum is σ = 2782760522. Its totient is φ = 2782760520.

The previous prime is 2782760507. The next prime is 2782760527. The reversal of 2782760521 is 1250672872.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2541268921 + 241491600 = 50411^2 + 15540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2782760521 - 2²⁹ = 2245889609 is a prime.

It is a super-2 number, since 2×2782760521² = 15487512234472382882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2782760527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391380260 + 1391380261.

It is an arithmetic number, because the mean of its divisors is an integer number (1391380261).

Almost surely, 2^2782760521 is an apocalyptic number.

It is an amenable number.

2782760521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2782760521 is an equidigital number, since it uses as much as digits as its factorization.

2782760521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 2782760521 is about 52751.8769429108. The cubic root of 2782760521 is about 1406.5611284433.

The spelling of 2782760521 in words is "two billion, seven hundred eighty-two million, seven hundred sixty thousand, five hundred twenty-one".