1081349309 has 8 divisors (see below), whose sum is σ = 1111014360. Its totient is φ = 1051707456.

The previous prime is 1081349279. The next prime is 1081349317. The reversal of 1081349309 is 9039431801.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 193488100 + 887861209 = 13910^2 + 29797^2 .

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 1081349309 - 2²⁸ = 812913853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081349359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134207 + ... + 142035.

It is an arithmetic number, because the mean of its divisors is an integer number (138876795).

Almost surely, 2^1081349309 is an apocalyptic number.

It is an amenable number.

1081349309 is a deficient number, since it is larger than the sum of its proper divisors (29665051).

1081349309 is an equidigital number, since it uses as much as digits as its factorization.

1081349309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11599.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1081349309 is about 32883.8761249339. The cubic root of 1081349309 is about 1026.4126653623.

The spelling of 1081349309 in words is "one billion, eighty-one million, three hundred forty-nine thousand, three hundred nine".