2890705681 has 2 divisors, whose sum is σ = 2890705682. Its totient is φ = 2890705680.

The previous prime is 2890705679. The next prime is 2890705723. The reversal of 2890705681 is 1865070982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2862785025 + 27920656 = 53505^2 + 5284^2 .

It is a cyclic number.

It is not a de Polignac number, because 2890705681 - 2¹ = 2890705679 is a prime.

It is a super-2 number, since 2×2890705681² = 16712358668331347522, which contains 22 as substring.

Together with 2890705679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2890705621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445352840 + 1445352841.

It is an arithmetic number, because the mean of its divisors is an integer number (1445352841).

Almost surely, 2^2890705681 is an apocalyptic number.

It is an amenable number.

2890705681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2890705681 is an equidigital number, since it uses as much as digits as its factorization.

2890705681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 2890705681 is about 53765.2832318402. The cubic root of 2890705681 is about 1424.5180569466.

The spelling of 2890705681 in words is "two billion, eight hundred ninety million, seven hundred five thousand, six hundred eighty-one".