1083688645 has 16 divisors (see below), whose sum is σ = 1412862192. Its totient is φ = 793175040.

The previous prime is 1083688643. The next prime is 1083688651. The reversal of 1083688645 is 5468863801.

It can be written as a sum of positive squares in 8 ways, for example, as 659411041 + 424277604 = 25679^2 + 20598^2 .

It is not a de Polignac number, because 1083688645 - 2¹ = 1083688643 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 (1083688643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66426 + ... + 81115.

It is an arithmetic number, because the mean of its divisors is an integer number (88303887).

Almost surely, 2^1083688645 is an apocalyptic number.

It is an amenable number.

1083688645 is a deficient number, since it is larger than the sum of its proper divisors (329173547).

1083688645 is a wasteful number, since it uses less digits than its factorization.

1083688645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147672.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The square root of 1083688645 is about 32919.4265594041. The cubic root of 1083688645 is about 1027.1522952140.

The spelling of 1083688645 in words is "one billion, eighty-three million, six hundred eighty-eight thousand, six hundred forty-five".