9912910251389 has 2 divisors, whose sum is σ = 9912910251390. Its totient is φ = 9912910251388.

The previous prime is 9912910251347. The next prime is 9912910251463. The reversal of 9912910251389 is 9831520192199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9655717243225 + 257193008164 = 3107365^2 + 507142^2 .

It is a cyclic number.

It is not a de Polignac number, because 9912910251389 - 2²⁸ = 9912641815933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9912910251319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956455125694 + 4956455125695.

It is an arithmetic number, because the mean of its divisors is an integer number (4956455125695).

Almost surely, 2^{9912910251389} is an apocalyptic number.

It is an amenable number.

9912910251389 is a deficient number, since it is larger than the sum of its proper divisors (1).

9912910251389 is an equidigital number, since it uses as much as digits as its factorization.

9912910251389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3149280, while the sum is 59.

The spelling of 9912910251389 in words is "nine trillion, nine hundred twelve billion, nine hundred ten million, two hundred fifty-one thousand, three hundred eighty-nine".