10999991927 has 2 divisors, whose sum is σ = 10999991928. Its totient is φ = 10999991926.

The previous prime is 10999991921. The next prime is 10999991953. The reversal of 10999991927 is 72919999901.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10999991927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10999991921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5499995963 + 5499995964.

It is an arithmetic number, because the mean of its divisors is an integer number (5499995964).

Almost surely, 2^10999991927 is an apocalyptic number.

10999991927 is a deficient number, since it is larger than the sum of its proper divisors (1).

10999991927 is an equidigital number, since it uses as much as digits as its factorization.

10999991927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7440174, while the sum is 65.

The spelling of 10999991927 in words is "ten billion, nine hundred ninety-nine million, nine hundred ninety-one thousand, nine hundred twenty-seven".