531669643 has 4 divisors (see below), whose sum is σ = 531911248. Its totient is φ = 531428040.

The previous prime is 531669637. The next prime is 531669689. The reversal of 531669643 is 346966135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346966135 = 5 ⋅69393227.

It is a cyclic number.

It is not a de Polignac number, because 531669643 - 2¹⁷ = 531538571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531669643.

It is not an unprimeable number, because it can be changed into a prime (531669143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117471 + ... + 121912.

It is an arithmetic number, because the mean of its divisors is an integer number (132977812).

Almost surely, 2^531669643 is an apocalyptic number.

531669643 is a deficient number, since it is larger than the sum of its proper divisors (241605).

531669643 is a wasteful number, since it uses less digits than its factorization.

531669643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241604.

The product of its digits is 349920, while the sum is 43.

The square root of 531669643 is about 23057.9626810349. The cubic root of 531669643 is about 810.1161460235.

The spelling of 531669643 in words is "five hundred thirty-one million, six hundred sixty-nine thousand, six hundred forty-three".