1896689601 has 21 divisors (see below), whose sum is σ = 2845497619. Its totient is φ = 1263675816.

The previous prime is 1896689593. The next prime is 1896689617. The reversal of 1896689601 is 1069866981.

The square root of 1896689601 is 43551.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1185080625 + 711608976 = 34425^2 + 26676^2 .

It is not a de Polignac number, because 1896689601 - 2³ = 1896689593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1896689651) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 1175071 + ... + 1176683.

Almost surely, 2^1896689601 is an apocalyptic number.

1896689601 is the 43551-st square number.

1896689601 is the 21776-th centered octagonal number.

It is an amenable number.

1896689601 is a deficient number, since it is larger than the sum of its proper divisors (948808018).

1896689601 is an frugal number, since it uses more digits than its factorization.

1896689601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The cubic root of 1896689601 is about 1237.8425894463.

The spelling of 1896689601 in words is "one billion, eight hundred ninety-six million, six hundred eighty-nine thousand, six hundred one".