1659533949 has 6 divisors (see below), whose sum is σ = 2397104606. Its totient is φ = 1106355960.

The previous prime is 1659533947. The next prime is 1659533957. The reversal of 1659533949 is 9493359561.

1659533949 is a `hidden beast` number, since 1 + 6 + 595 + 3 + 3 + 9 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1263802500 + 395731449 = 35550^2 + 19893^2 .

It is not a de Polignac number, because 1659533949 - 2¹ = 1659533947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1659533895 and 1659533904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659533947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92196322 + ... + 92196339.

Almost surely, 2^1659533949 is an apocalyptic number.

It is an amenable number.

1659533949 is a deficient number, since it is larger than the sum of its proper divisors (737570657).

1659533949 is a wasteful number, since it uses less digits than its factorization.

1659533949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184392667 (or 184392664 counting only the distinct ones).

The product of its digits is 3936600, while the sum is 54.

The square root of 1659533949 is about 40737.3777874816. The cubic root of 1659533949 is about 1183.9373285723.

The spelling of 1659533949 in words is "one billion, six hundred fifty-nine million, five hundred thirty-three thousand, nine hundred forty-nine".