1369685605 has 4 divisors (see below), whose sum is σ = 1643622732. Its totient is φ = 1095748480.

The previous prime is 1369685593. The next prime is 1369685621. The reversal of 1369685605 is 5065869631.

It is a happy number.

1369685605 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 684397921 + 685287684 = 26161^2 + 26178^2 .

It is not a de Polignac number, because 1369685605 - 2⁷ = 1369685477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136968556 + ... + 136968565.

It is an arithmetic number, because the mean of its divisors is an integer number (410905683).

Almost surely, 2^1369685605 is an apocalyptic number.

It is an amenable number.

1369685605 is a deficient number, since it is larger than the sum of its proper divisors (273937127).

1369685605 is an equidigital number, since it uses as much as digits as its factorization.

1369685605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273937126.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The square root of 1369685605 is about 37009.2637727367. The cubic root of 1369685605 is about 1110.5555763801. Note that the first 4 decimals are identical.

The spelling of 1369685605 in words is "one billion, three hundred sixty-nine million, six hundred eighty-five thousand, six hundred five".