1109992691 has 2 divisors, whose sum is σ = 1109992692. Its totient is φ = 1109992690.

The previous prime is 1109992633. The next prime is 1109992717. The reversal of 1109992691 is 1962999011.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1109992691 is a prime.

It is not a weakly prime, because it can be changed into another prime (1109992591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554996345 + 554996346.

It is an arithmetic number, because the mean of its divisors is an integer number (554996346).

Almost surely, 2^1109992691 is an apocalyptic number.

1109992691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109992691 is an equidigital number, since it uses as much as digits as its factorization.

1109992691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 47.

The square root of 1109992691 is about 33316.5528078761. The cubic root of 1109992691 is about 1035.3965328519.

The spelling of 1109992691 in words is "one billion, one hundred nine million, nine hundred ninety-two thousand, six hundred ninety-one".