31937841139 has 2 divisors, whose sum is σ = 31937841140. Its totient is φ = 31937841138.

The previous prime is 31937841121. The next prime is 31937841151. The reversal of 31937841139 is 93114873913.

It is a strong prime.

It is an emirp because it is prime and its reverse (93114873913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31937841139 - 2³¹ = 29790357491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31937841092 and 31937841101.

It is not a weakly prime, because it can be changed into another prime (31937841739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15968920569 + 15968920570.

It is an arithmetic number, because the mean of its divisors is an integer number (15968920570).

Almost surely, 2^31937841139 is an apocalyptic number.

31937841139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31937841139 is an equidigital number, since it uses as much as digits as its factorization.

31937841139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The spelling of 31937841139 in words is "thirty-one billion, nine hundred thirty-seven million, eight hundred forty-one thousand, one hundred thirty-nine".