31449829717 has 2 divisors, whose sum is σ = 31449829718. Its totient is φ = 31449829716.

The previous prime is 31449829687. The next prime is 31449829757. The reversal of 31449829717 is 71792894413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26704135396 + 4745694321 = 163414^2 + 68889^2 .

It is a cyclic number.

It is not a de Polignac number, because 31449829717 - 2¹⁹ = 31449305429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31449829757) 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 as a sum of consecutive naturals, namely, 15724914858 + 15724914859.

It is an arithmetic number, because the mean of its divisors is an integer number (15724914859).

Almost surely, 2^31449829717 is an apocalyptic number.

It is an amenable number.

31449829717 is a deficient number, since it is larger than the sum of its proper divisors (1).

31449829717 is an equidigital number, since it uses as much as digits as its factorization.

31449829717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 55.

The spelling of 31449829717 in words is "thirty-one billion, four hundred forty-nine million, eight hundred twenty-nine thousand, seven hundred seventeen".