2009105797 has 2 divisors, whose sum is σ = 2009105798. Its totient is φ = 2009105796.

The previous prime is 2009105783. The next prime is 2009105803. The reversal of 2009105797 is 7975019002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1070663841 + 938441956 = 32721^2 + 30634^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009105797 - 2¹⁵ = 2009073029 is a prime.

It is a super-2 number, since 2×2009105797² = 8073012207078010418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2009105897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004552898 + 1004552899.

It is an arithmetic number, because the mean of its divisors is an integer number (1004552899).

Almost surely, 2^2009105797 is an apocalyptic number.

It is an amenable number.

2009105797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009105797 is an equidigital number, since it uses as much as digits as its factorization.

2009105797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 2009105797 is about 44823.0498404560. The cubic root of 2009105797 is about 1261.8302529033.

The spelling of 2009105797 in words is "two billion, nine million, one hundred five thousand, seven hundred ninety-seven".