1090208920897 has 2 divisors, whose sum is σ = 1090208920898. Its totient is φ = 1090208920896.

The previous prime is 1090208920861. The next prime is 1090208920919. The reversal of 1090208920897 is 7980298020901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1003330768896 + 86878152001 = 1001664^2 + 294751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090208920897 - 2¹¹ = 1090208918849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1090208920807) 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, 545104460448 + 545104460449.

It is an arithmetic number, because the mean of its divisors is an integer number (545104460449).

Almost surely, 2^{1090208920897} is an apocalyptic number.

It is an amenable number.

1090208920897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090208920897 is an equidigital number, since it uses as much as digits as its factorization.

1090208920897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 1090208920897 in words is "one trillion, ninety billion, two hundred eight million, nine hundred twenty thousand, eight hundred ninety-seven".