999993233887 has 2 divisors, whose sum is σ = 999993233888. Its totient is φ = 999993233886.

The previous prime is 999993233881. The next prime is 999993233891. The reversal of 999993233887 is 788332399999.

It is a strong prime.

It is an emirp because it is prime and its reverse (788332399999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999993233887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999993233881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499996616943 + 499996616944.

It is an arithmetic number, because the mean of its divisors is an integer number (499996616944).

Almost surely, 2^999993233887 is an apocalyptic number.

999993233887 is a deficient number, since it is larger than the sum of its proper divisors (1).

999993233887 is an equidigital number, since it uses as much as digits as its factorization.

999993233887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428513408, while the sum is 79.

The spelling of 999993233887 in words is "nine hundred ninety-nine billion, nine hundred ninety-three million, two hundred thirty-three thousand, eight hundred eighty-seven".