1279001673 has 6 divisors (see below), whose sum is σ = 1847446874. Its totient is φ = 852667776.

The previous prime is 1279001653. The next prime is 1279001699. The reversal of 1279001673 is 3761009721.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 987719184 + 291282489 = 31428^2 + 17067^2 .

It is not a de Polignac number, because 1279001673 - 2¹⁰ = 1279000649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279001623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71055640 + ... + 71055657.

Almost surely, 2^1279001673 is an apocalyptic number.

It is an amenable number.

1279001673 is a deficient number, since it is larger than the sum of its proper divisors (568445201).

1279001673 is a wasteful number, since it uses less digits than its factorization.

1279001673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142111303 (or 142111300 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 1279001673 is about 35763.1328745120. The cubic root of 1279001673 is about 1085.4846944278.

The spelling of 1279001673 in words is "one billion, two hundred seventy-nine million, one thousand, six hundred seventy-three".