31000068600077 has 2 divisors, whose sum is σ = 31000068600078. Its totient is φ = 31000068600076.

The previous prime is 31000068600031. The next prime is 31000068600131. The reversal of 31000068600077 is 77000686000013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19401725658121 + 11598342941956 = 4404739^2 + 3405634^2 .

It is a cyclic number.

It is not a de Polignac number, because 31000068600077 - 2¹² = 31000068595981 is a prime.

It is a super-2 number, since 2×31000068600077² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31000068600077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31000068620077) 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, 15500034300038 + 15500034300039.

It is an arithmetic number, because the mean of its divisors is an integer number (15500034300039).

Almost surely, 2^{31000068600077} is an apocalyptic number.

It is an amenable number.

31000068600077 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000068600077 is an equidigital number, since it uses as much as digits as its factorization.

31000068600077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 31000068600077 in words is "thirty-one trillion, sixty-eight million, six hundred thousand, seventy-seven".