1279794190439 has 2 divisors, whose sum is σ = 1279794190440. Its totient is φ = 1279794190438.

The previous prime is 1279794190393. The next prime is 1279794190459. The reversal of 1279794190439 is 9340914979721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1279794190439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1279794190459) 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, 639897095219 + 639897095220.

It is an arithmetic number, because the mean of its divisors is an integer number (639897095220).

Almost surely, 2^{1279794190439} is an apocalyptic number.

1279794190439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279794190439 is an equidigital number, since it uses as much as digits as its factorization.

1279794190439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30862944, while the sum is 65.

The spelling of 1279794190439 in words is "one trillion, two hundred seventy-nine billion, seven hundred ninety-four million, one hundred ninety thousand, four hundred thirty-nine".