1118920447 has 2 divisors, whose sum is σ = 1118920448. Its totient is φ = 1118920446.

The previous prime is 1118920423. The next prime is 1118920477. The reversal of 1118920447 is 7440298111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118920447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118920477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559460223 + 559460224.

It is an arithmetic number, because the mean of its divisors is an integer number (559460224).

Almost surely, 2^1118920447 is an apocalyptic number.

1118920447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118920447 is an equidigital number, since it uses as much as digits as its factorization.

1118920447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1118920447 is about 33450.2682649930. The cubic root of 1118920447 is about 1038.1650480729.

The spelling of 1118920447 in words is "one billion, one hundred eighteen million, nine hundred twenty thousand, four hundred forty-seven".