1000009978423 has 2 divisors, whose sum is σ = 1000009978424. Its totient is φ = 1000009978422.

The previous prime is 1000009978343. The next prime is 1000009978427. The reversal of 1000009978423 is 3248799000001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000009978423 - 2¹³ = 1000009970231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000009978423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000009978427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500004989211 + 500004989212.

It is an arithmetic number, because the mean of its divisors is an integer number (500004989212).

Almost surely, 2^{1000009978423} is an apocalyptic number.

1000009978423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000009978423 is an equidigital number, since it uses as much as digits as its factorization.

1000009978423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 1000009978423 in words is "one trillion, nine million, nine hundred seventy-eight thousand, four hundred twenty-three".