31435309439 has 2 divisors, whose sum is σ = 31435309440. Its totient is φ = 31435309438.

The previous prime is 31435309379. The next prime is 31435309459. The reversal of 31435309439 is 93490353413.

It is a strong prime.

It is an emirp because it is prime and its reverse (93490353413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31435309439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31435309439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31435309459) 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, 15717654719 + 15717654720.

It is an arithmetic number, because the mean of its divisors is an integer number (15717654720).

Almost surely, 2^31435309439 is an apocalyptic number.

31435309439 is a deficient number, since it is larger than the sum of its proper divisors (1).

31435309439 is an equidigital number, since it uses as much as digits as its factorization.

31435309439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 44.

The spelling of 31435309439 in words is "thirty-one billion, four hundred thirty-five million, three hundred nine thousand, four hundred thirty-nine".