2091092681 has 2 divisors, whose sum is σ = 2091092682. Its totient is φ = 2091092680.

The previous prime is 2091092677. The next prime is 2091092723. The reversal of 2091092681 is 1862901902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1976602681 + 114490000 = 44459^2 + 10700^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091092681 - 2² = 2091092677 is a prime.

It is a super-2 number, since 2×2091092681² = 8745337201063535522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2091095681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045546340 + 1045546341.

It is an arithmetic number, because the mean of its divisors is an integer number (1045546341).

Almost surely, 2^2091092681 is an apocalyptic number.

It is an amenable number.

2091092681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091092681 is an equidigital number, since it uses as much as digits as its factorization.

2091092681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 2091092681 is about 45728.4668559968. The cubic root of 2091092681 is about 1278.7660391983.

The spelling of 2091092681 in words is "two billion, ninety-one million, ninety-two thousand, six hundred eighty-one".