1090912205 has 6 divisors (see below), whose sum is σ = 1309183278. Its totient is φ = 872670680.

The previous prime is 1090912177. The next prime is 1090912217. The reversal of 1090912205 is 5022190901.

It can be written as a sum of positive squares in only one way, i.e., 872729764 + 218182441 = 29542^2 + 14771^2 .

It is not a de Polignac number, because 1090912205 - 2⁸ = 1090911949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66470 + ... + 81240.

It is an arithmetic number, because the mean of its divisors is an integer number (218197213).

Almost surely, 2^1090912205 is an apocalyptic number.

It is an amenable number.

1090912205 is a deficient number, since it is larger than the sum of its proper divisors (218271073).

1090912205 is an frugal number, since it uses more digits than its factorization.

1090912205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29547 (or 14776 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 1090912205 is about 33028.9600956494. The cubic root of 1090912205 is about 1029.4294779291.

Multiplying 1090912205 by its product of nonzero digits (1620), we get a square (1767277772100 = 1329390²).

The spelling of 1090912205 in words is "one billion, ninety million, nine hundred twelve thousand, two hundred five".