1081408613 has 2 divisors, whose sum is σ = 1081408614. Its totient is φ = 1081408612.

The previous prime is 1081408589. The next prime is 1081408673. The reversal of 1081408613 is 3168041801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628655329 + 452753284 = 25073^2 + 21278^2 .

It is an emirp because it is prime and its reverse (3168041801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1081408613 - 2⁸ = 1081408357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1081408613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081408673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540704306 + 540704307.

It is an arithmetic number, because the mean of its divisors is an integer number (540704307).

Almost surely, 2^1081408613 is an apocalyptic number.

It is an amenable number.

1081408613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081408613 is an equidigital number, since it uses as much as digits as its factorization.

1081408613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1081408613 is about 32884.7778310877. Note that the first 3 decimals coincide. The cubic root of 1081408613 is about 1026.4314287300.

The spelling of 1081408613 in words is "one billion, eighty-one million, four hundred eight thousand, six hundred thirteen".