31419945847 has 2 divisors, whose sum is σ = 31419945848. Its totient is φ = 31419945846.

The previous prime is 31419945839. The next prime is 31419945857. The reversal of 31419945847 is 74854991413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31419945847 - 2³ = 31419945839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31419945857) 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, 15709972923 + 15709972924.

It is an arithmetic number, because the mean of its divisors is an integer number (15709972924).

Almost surely, 2^31419945847 is an apocalyptic number.

31419945847 is a deficient number, since it is larger than the sum of its proper divisors (1).

31419945847 is an equidigital number, since it uses as much as digits as its factorization.

31419945847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 55.

The spelling of 31419945847 in words is "thirty-one billion, four hundred nineteen million, nine hundred forty-five thousand, eight hundred forty-seven".