531939109 has 8 divisors (see below), whose sum is σ = 574306040. Its totient is φ = 489779136.

The previous prime is 531939077. The next prime is 531939113. The reversal of 531939109 is 901939135.

It can be written as a sum of positive squares in 4 ways, for example, as 114554209 + 417384900 = 10703^2 + 20430^2 .

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 531939109 - 2⁵ = 531939077 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 (531939179) 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 7 ways as a sum of consecutive naturals, for example, 46374 + ... + 56695.

It is an arithmetic number, because the mean of its divisors is an integer number (71788255).

Almost surely, 2^531939109 is an apocalyptic number.

It is an amenable number.

531939109 is a deficient number, since it is larger than the sum of its proper divisors (42366931).

531939109 is a wasteful number, since it uses less digits than its factorization.

531939109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103479.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 531939109 is about 23063.8051717404. The cubic root of 531939109 is about 810.2529865663.

The spelling of 531939109 in words is "five hundred thirty-one million, nine hundred thirty-nine thousand, one hundred nine".