999998884477 has 2 divisors, whose sum is σ = 999998884478. Its totient is φ = 999998884476.

The previous prime is 999998884471. The next prime is 999998884499. The reversal of 999998884477 is 774488899999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997419666681 + 2579217796 = 998709^2 + 50786^2 .

It is a cyclic number.

It is not a de Polignac number, because 999998884477 - 2¹¹ = 999998882429 is a prime.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 999998884391 and 999998884400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998884471) 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, 499999442238 + 499999442239.

It is an arithmetic number, because the mean of its divisors is an integer number (499999442239).

Almost surely, 2^999998884477 is an apocalyptic number.

It is an amenable number.

999998884477 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998884477 is an equidigital number, since it uses as much as digits as its factorization.

999998884477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23702740992, while the sum is 91.

The spelling of 999998884477 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred eighty-four thousand, four hundred seventy-seven".