31130135389 has 2 divisors, whose sum is σ = 31130135390. Its totient is φ = 31130135388.

The previous prime is 31130135383. The next prime is 31130135417. The reversal of 31130135389 is 98353103113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29776263364 + 1353872025 = 172558^2 + 36795^2 .

It is an emirp because it is prime and its reverse (98353103113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31130135389 - 2⁵ = 31130135357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31130135383) 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, 15565067694 + 15565067695.

It is an arithmetic number, because the mean of its divisors is an integer number (15565067695).

Almost surely, 2^31130135389 is an apocalyptic number.

It is an amenable number.

31130135389 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130135389 is an equidigital number, since it uses as much as digits as its factorization.

31130135389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 31130135389 in words is "thirty-one billion, one hundred thirty million, one hundred thirty-five thousand, three hundred eighty-nine".