531139679 has 8 divisors (see below), whose sum is σ = 607231008. Its totient is φ = 455101920.

The previous prime is 531139639. The next prime is 531139729. The reversal of 531139679 is 976931135.

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

It is not a de Polignac number, because 531139679 - 2²⁴ = 514362463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531139639) 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, 10769 + ... + 34325.

It is an arithmetic number, because the mean of its divisors is an integer number (75903876).

Almost surely, 2^531139679 is an apocalyptic number.

531139679 is a deficient number, since it is larger than the sum of its proper divisors (76091329).

531139679 is a wasteful number, since it uses less digits than its factorization.

531139679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26785.

The product of its digits is 153090, while the sum is 44.

The square root of 531139679 is about 23046.4678204709. The cubic root of 531139679 is about 809.8468841302.

The spelling of 531139679 in words is "five hundred thirty-one million, one hundred thirty-nine thousand, six hundred seventy-nine".