1729964981879 has 2 divisors, whose sum is σ = 1729964981880. Its totient is φ = 1729964981878.

The previous prime is 1729964981873. The next prime is 1729964981923. The reversal of 1729964981879 is 9781894699271.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1729964981879 - 2⁴ = 1729964981863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1729964981873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864982490939 + 864982490940.

It is an arithmetic number, because the mean of its divisors is an integer number (864982490940).

Almost surely, 2^{1729964981879} is an apocalyptic number.

1729964981879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1729964981879 is an equidigital number, since it uses as much as digits as its factorization.

1729964981879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987614208, while the sum is 80.

The spelling of 1729964981879 in words is "one trillion, seven hundred twenty-nine billion, nine hundred sixty-four million, nine hundred eighty-one thousand, eight hundred seventy-nine".