9991111283 has 2 divisors, whose sum is σ = 9991111284. Its totient is φ = 9991111282.

The previous prime is 9991111279. The next prime is 9991111301. The reversal of 9991111283 is 3821111999.

It is a weak prime.

It is an emirp because it is prime and its reverse (3821111999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9991111283 - 2² = 9991111279 is a prime.

It is not a weakly prime, because it can be changed into another prime (9991111223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995555641 + 4995555642.

It is an arithmetic number, because the mean of its divisors is an integer number (4995555642).

Almost surely, 2^9991111283 is an apocalyptic number.

9991111283 is a deficient number, since it is larger than the sum of its proper divisors (1).

9991111283 is an equidigital number, since it uses as much as digits as its factorization.

9991111283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 44.

The square root of 9991111283 is about 99955.5465344470. The cubic root of 9991111283 is about 2153.7961621295.

The spelling of 9991111283 in words is "nine billion, nine hundred ninety-one million, one hundred eleven thousand, two hundred eighty-three".