31593109 has 2 divisors, whose sum is σ = 31593110. Its totient is φ = 31593108.

The previous prime is 31593097. The next prime is 31593173. The reversal of 31593109 is 90139513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26316900 + 5276209 = 5130^2 + 2297^2 .

It is an emirp because it is prime and its reverse (90139513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31593109 - 2¹¹ = 31591061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31573109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15796554 + 15796555.

It is an arithmetic number, because the mean of its divisors is an integer number (15796555).

Almost surely, 2^31593109 is an apocalyptic number.

It is an amenable number.

31593109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31593109 is an equidigital number, since it uses as much as digits as its factorization.

31593109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 31593109 is about 5620.7747686596. The cubic root of 31593109 is about 316.1288430692.

The spelling of 31593109 in words is "thirty-one million, five hundred ninety-three thousand, one hundred nine".