1009919243 has 2 divisors, whose sum is σ = 1009919244. Its totient is φ = 1009919242.

The previous prime is 1009919231. The next prime is 1009919263. The reversal of 1009919243 is 3429199001.

It is a weak prime.

It is an emirp because it is prime and its reverse (3429199001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1009919243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1009919197 and 1009919206.

It is not a weakly prime, because it can be changed into another prime (1009919263) 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, 504959621 + 504959622.

It is an arithmetic number, because the mean of its divisors is an integer number (504959622).

Almost surely, 2^1009919243 is an apocalyptic number.

1009919243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009919243 is an equidigital number, since it uses as much as digits as its factorization.

1009919243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1009919243 is about 31779.2265953720. The cubic root of 1009919243 is about 1003.2955418070.

The spelling of 1009919243 in words is "one billion, nine million, nine hundred nineteen thousand, two hundred forty-three".