2987780813 has 2 divisors, whose sum is σ = 2987780814. Its totient is φ = 2987780812.

The previous prime is 2987780777. The next prime is 2987780833. The reversal of 2987780813 is 3180877892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2590097449 + 397683364 = 50893^2 + 19942^2 .

It is a cyclic number.

It is not a de Polignac number, because 2987780813 - 2¹² = 2987776717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2987780833) 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, 1493890406 + 1493890407.

It is an arithmetic number, because the mean of its divisors is an integer number (1493890407).

Almost surely, 2^2987780813 is an apocalyptic number.

It is an amenable number.

2987780813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2987780813 is an equidigital number, since it uses as much as digits as its factorization.

2987780813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The square root of 2987780813 is about 54660.5965298587. The cubic root of 2987780813 is about 1440.2887816214.

The spelling of 2987780813 in words is "two billion, nine hundred eighty-seven million, seven hundred eighty thousand, eight hundred thirteen".