31749150109 has 2 divisors, whose sum is σ = 31749150110. Its totient is φ = 31749150108.

The previous prime is 31749150053. The next prime is 31749150179. The reversal of 31749150109 is 90105194713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19188344484 + 12560805625 = 138522^2 + 112075^2 .

It is an emirp because it is prime and its reverse (90105194713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31749150109 - 2⁷ = 31749149981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31749150179) 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 as a sum of consecutive naturals, namely, 15874575054 + 15874575055.

It is an arithmetic number, because the mean of its divisors is an integer number (15874575055).

Almost surely, 2^31749150109 is an apocalyptic number.

It is an amenable number.

31749150109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31749150109 is an equidigital number, since it uses as much as digits as its factorization.

31749150109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 31749150109 in words is "thirty-one billion, seven hundred forty-nine million, one hundred fifty thousand, one hundred nine".