531431689 has 8 divisors (see below), whose sum is σ = 544190400. Its totient is φ = 518774256.

The previous prime is 531431647. The next prime is 531431701. The reversal of 531431689 is 986134135.

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

It is a cyclic number.

It is not a de Polignac number, because 531431689 - 2⁷ = 531431561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531431609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14647 + ... + 35740.

It is an arithmetic number, because the mean of its divisors is an integer number (68023800).

Almost surely, 2^531431689 is an apocalyptic number.

It is an amenable number.

531431689 is a deficient number, since it is larger than the sum of its proper divisors (12758711).

531431689 is a wasteful number, since it uses less digits than its factorization.

531431689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50639.

The product of its digits is 77760, while the sum is 40.

The square root of 531431689 is about 23052.8021940935. The cubic root of 531431689 is about 809.9952694943.

The spelling of 531431689 in words is "five hundred thirty-one million, four hundred thirty-one thousand, six hundred eighty-nine".