2681779313 has 2 divisors, whose sum is σ = 2681779314. Its totient is φ = 2681779312.

The previous prime is 2681779307. The next prime is 2681779327. The reversal of 2681779313 is 3139771862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1623122944 + 1058656369 = 40288^2 + 32537^2 .

It is a cyclic number.

It is not a de Polignac number, because 2681779313 - 2⁸ = 2681779057 is a prime.

It is not a weakly prime, because it can be changed into another prime (2681779363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340889656 + 1340889657.

It is an arithmetic number, because the mean of its divisors is an integer number (1340889657).

Almost surely, 2^2681779313 is an apocalyptic number.

It is an amenable number.

2681779313 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681779313 is an equidigital number, since it uses as much as digits as its factorization.

2681779313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 2681779313 is about 51785.8987852871. The cubic root of 2681779313 is about 1389.3372464591.

The spelling of 2681779313 in words is "two billion, six hundred eighty-one million, seven hundred seventy-nine thousand, three hundred thirteen".