1121769647 has 2 divisors, whose sum is σ = 1121769648. Its totient is φ = 1121769646.

The previous prime is 1121769643. The next prime is 1121769679. The reversal of 1121769647 is 7469671211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121769647 - 2² = 1121769643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121769598 and 1121769607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121769643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560884823 + 560884824.

It is an arithmetic number, because the mean of its divisors is an integer number (560884824).

Almost surely, 2^1121769647 is an apocalyptic number.

1121769647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121769647 is an equidigital number, since it uses as much as digits as its factorization.

1121769647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 1121769647 is about 33492.8297848958. The cubic root of 1121769647 is about 1039.0454897897.

The spelling of 1121769647 in words is "one billion, one hundred twenty-one million, seven hundred sixty-nine thousand, six hundred forty-seven".