2682509981 has 2 divisors, whose sum is σ = 2682509982. Its totient is φ = 2682509980.

The previous prime is 2682509971. The next prime is 2682510013. The reversal of 2682509981 is 1899052862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2587349956 + 95160025 = 50866^2 + 9755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2682509981 is a prime.

It is a super-2 number, since 2×2682509981² = 14391719596329240722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2682509971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1341254990 + 1341254991.

It is an arithmetic number, because the mean of its divisors is an integer number (1341254991).

Almost surely, 2^2682509981 is an apocalyptic number.

It is an amenable number.

2682509981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2682509981 is an equidigital number, since it uses as much as digits as its factorization.

2682509981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 2682509981 is about 51792.9530052110. The cubic root of 2682509981 is about 1389.4634129539.

The spelling of 2682509981 in words is "two billion, six hundred eighty-two million, five hundred nine thousand, nine hundred eighty-one".