1090064209 has 8 divisors (see below), whose sum is σ = 1214395560. Its totient is φ = 971515776.

The previous prime is 1090064203. The next prime is 1090064221. The reversal of 1090064209 is 9024600901.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 154927809 + 935136400 = 12447^2 + 30580^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1090064209 - 2²¹ = 1087967057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090064203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445332 + ... + 1446085.

It is an arithmetic number, because the mean of its divisors is an integer number (151799445).

Almost surely, 2^1090064209 is an apocalyptic number.

It is an amenable number.

1090064209 is a deficient number, since it is larger than the sum of its proper divisors (124331351).

1090064209 is a wasteful number, since it uses less digits than its factorization.

1090064209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891459.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1090064209 is about 33016.1204413844. The cubic root of 1090064209 is about 1029.1626741896.

The spelling of 1090064209 in words is "one billion, ninety million, sixty-four thousand, two hundred nine".