1081809353 has 4 divisors (see below), whose sum is σ = 1083115140. Its totient is φ = 1080503568.

The previous prime is 1081809317. The next prime is 1081809371. The reversal of 1081809353 is 3539081801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 740003209 + 341806144 = 27203^2 + 18488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1081809353 is a prime.

It is a super-2 number, since 2×1081809353² = 2340622952476557218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081809383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651650 + ... + 653307.

It is an arithmetic number, because the mean of its divisors is an integer number (270778785).

Almost surely, 2^1081809353 is an apocalyptic number.

It is an amenable number.

1081809353 is a deficient number, since it is larger than the sum of its proper divisors (1305787).

1081809353 is an equidigital number, since it uses as much as digits as its factorization.

1081809353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305786.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 1081809353 is about 32890.8703594174. The cubic root of 1081809353 is about 1026.5582020658.

The spelling of 1081809353 in words is "one billion, eighty-one million, eight hundred nine thousand, three hundred fifty-three".