999999948997447 has 2 divisors, whose sum is σ = 999999948997448. Its totient is φ = 999999948997446.

The previous prime is 999999948997429. The next prime is 999999948997453. The reversal of 999999948997447 is 744799849999999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999999948997447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999948995447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999974498723 + 499999974498724.

It is an arithmetic number, because the mean of its divisors is an integer number (499999974498724).

Almost surely, 2^{999999948997447} is an apocalyptic number.

999999948997447 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999948997447 is an equidigital number, since it uses as much as digits as its factorization.

999999948997447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9719605228032, while the sum is 115.

The spelling of 999999948997447 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred forty-eight million, nine hundred ninety-seven thousand, four hundred forty-seven".