1279770347491 has 2 divisors, whose sum is σ = 1279770347492. Its totient is φ = 1279770347490.

The previous prime is 1279770347477. The next prime is 1279770347563. The reversal of 1279770347491 is 1947430779721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1279770347491 - 2⁹ = 1279770346979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1279770327491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639885173745 + 639885173746.

It is an arithmetic number, because the mean of its divisors is an integer number (639885173746).

Almost surely, 2^{1279770347491} is an apocalyptic number.

1279770347491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279770347491 is an equidigital number, since it uses as much as digits as its factorization.

1279770347491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18670176, while the sum is 61.

It can be divided in two parts, 1279770 and 347491, that added together give a palindrome (1627261).

The spelling of 1279770347491 in words is "one trillion, two hundred seventy-nine billion, seven hundred seventy million, three hundred forty-seven thousand, four hundred ninety-one".