1000009978343 has 2 divisors, whose sum is σ = 1000009978344. Its totient is φ = 1000009978342.

The previous prime is 1000009978313. The next prime is 1000009978423. The reversal of 1000009978343 is 3438799000001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000009978343 - 2²⁶ = 999942869479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000009978294 and 1000009978303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000009978313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500004989171 + 500004989172.

It is an arithmetic number, because the mean of its divisors is an integer number (500004989172).

Almost surely, 2^{1000009978343} is an apocalyptic number.

1000009978343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000009978343 is an equidigital number, since it uses as much as digits as its factorization.

1000009978343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 1000009978343 in words is "one trillion, nine million, nine hundred seventy-eight thousand, three hundred forty-three".