2043689545 has 8 divisors (see below), whose sum is σ = 2465135496. Its totient is φ = 1626479616.

The previous prime is 2043689507. The next prime is 2043689563. The reversal of 2043689545 is 5459863402.

It can be written as a sum of positive squares in 4 ways, for example, as 40500496 + 2003189049 = 6364^2 + 44757^2 .

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 2043689545 - 2²⁹ = 1506818633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2043689495 and 2043689504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1057942 + ... + 1059871.

It is an arithmetic number, because the mean of its divisors is an integer number (308141937).

Almost surely, 2^2043689545 is an apocalyptic number.

It is an amenable number.

2043689545 is a deficient number, since it is larger than the sum of its proper divisors (421445951).

2043689545 is a wasteful number, since it uses less digits than its factorization.

2043689545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118011.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The square root of 2043689545 is about 45207.1846612903. The cubic root of 2043689545 is about 1269.0292755759.

The spelling of 2043689545 in words is "two billion, forty-three million, six hundred eighty-nine thousand, five hundred forty-five".