31443028873 has 2 divisors, whose sum is σ = 31443028874. Its totient is φ = 31443028872.

The previous prime is 31443028871. The next prime is 31443028891. The reversal of 31443028873 is 37882034413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19491510544 + 11951518329 = 139612^2 + 109323^2 .

It is a cyclic number.

It is not a de Polignac number, because 31443028873 - 2¹ = 31443028871 is a prime.

Together with 31443028871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31443028871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721514436 + 15721514437.

It is an arithmetic number, because the mean of its divisors is an integer number (15721514437).

Almost surely, 2^31443028873 is an apocalyptic number.

It is an amenable number.

31443028873 is a deficient number, since it is larger than the sum of its proper divisors (1).

31443028873 is an equidigital number, since it uses as much as digits as its factorization.

31443028873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 31443028873 in words is "thirty-one billion, four hundred forty-three million, twenty-eight thousand, eight hundred seventy-three".