2105399677 has 2 divisors, whose sum is σ = 2105399678. Its totient is φ = 2105399676.

The previous prime is 2105399609. The next prime is 2105399687. The reversal of 2105399677 is 7769935012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1868054841 + 237344836 = 43221^2 + 15406^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105399677 - 2¹⁹ = 2104875389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2105399677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105399687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052699838 + 1052699839.

It is an arithmetic number, because the mean of its divisors is an integer number (1052699839).

Almost surely, 2^2105399677 is an apocalyptic number.

It is an amenable number.

2105399677 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105399677 is an equidigital number, since it uses as much as digits as its factorization.

2105399677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 2105399677 is about 45884.6344324546. The cubic root of 2105399677 is about 1281.6757992371.

The spelling of 2105399677 in words is "two billion, one hundred five million, three hundred ninety-nine thousand, six hundred seventy-seven".