1090909090909 has 8 divisors (see below), whose sum is σ = 1204420990752. Its totient is φ = 979786915440.

The previous prime is 1090909090811. The next prime is 1090909090963. The reversal of 1090909090909 is 9090909090901.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1090909090909 - 2¹¹ = 1090909088861 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1090909090909 is a modest number, since divided by 9090909 gives 10909 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1090909090909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090909090109) 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, 597430134 + ... + 597431959.

It is an arithmetic number, because the mean of its divisors is an integer number (150552623844).

Almost surely, 2^{1090909090909} is an apocalyptic number.

It is an amenable number.

1090909090909 is a deficient number, since it is larger than the sum of its proper divisors (113511899843).

1090909090909 is a wasteful number, since it uses less digits than its factorization.

1090909090909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194862187.

The product of its (nonzero) digits is 531441, while the sum is 55.

Multiplying 1090909090909 by its sum of digits (55), we get a palindrome (59999999999995).

The spelling of 1090909090909 in words is "one trillion, ninety billion, nine hundred nine million, ninety thousand, nine hundred nine".