2104697081 has 2 divisors, whose sum is σ = 2104697082. Its totient is φ = 2104697080.

The previous prime is 2104697027. The next prime is 2104697099. The reversal of 2104697081 is 1807964012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2003010025 + 101687056 = 44755^2 + 10084^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104697081 - 2⁶ = 2104697017 is a prime.

It is a super-2 number, since 2×2104697081² = 8859499605539841122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2104697281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052348540 + 1052348541.

It is an arithmetic number, because the mean of its divisors is an integer number (1052348541).

Almost surely, 2^2104697081 is an apocalyptic number.

It is an amenable number.

2104697081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104697081 is an equidigital number, since it uses as much as digits as its factorization.

2104697081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 2104697081 is about 45876.9776794418. The cubic root of 2104697081 is about 1281.5332134077.

The spelling of 2104697081 in words is "two billion, one hundred four million, six hundred ninety-seven thousand, eighty-one".