9999090909487 has 2 divisors, whose sum is σ = 9999090909488. Its totient is φ = 9999090909486.

The previous prime is 9999090909407. The next prime is 9999090909497. The reversal of 9999090909487 is 7849090909999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9999090909487 - 2¹¹ = 9999090907439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9999090909487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999090909407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999545454743 + 4999545454744.

It is an arithmetic number, because the mean of its divisors is an integer number (4999545454744).

Almost surely, 2^{9999090909487} is an apocalyptic number.

9999090909487 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999090909487 is an equidigital number, since it uses as much as digits as its factorization.

9999090909487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1071385056, while the sum is 82.

The spelling of 9999090909487 in words is "nine trillion, nine hundred ninety-nine billion, ninety million, nine hundred nine thousand, four hundred eighty-seven".