531976643 has 8 divisors (see below), whose sum is σ = 580575936. Its totient is φ = 483417000.

The previous prime is 531976619. The next prime is 531976651. The reversal of 531976643 is 346679135.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531976643 - 2⁸ = 531976387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531976594 and 531976603.

It is not an unprimeable number, because it can be changed into a prime (531976673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22880 + ... + 39842.

It is an arithmetic number, because the mean of its divisors is an integer number (72571992).

Almost surely, 2^531976643 is an apocalyptic number.

531976643 is a deficient number, since it is larger than the sum of its proper divisors (48599293).

531976643 is a wasteful number, since it uses less digits than its factorization.

531976643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19825.

The product of its digits is 408240, while the sum is 44.

The square root of 531976643 is about 23064.6188565951. The cubic root of 531976643 is about 810.2720434595.

The spelling of 531976643 in words is "five hundred thirty-one million, nine hundred seventy-six thousand, six hundred forty-three".