79206871637 has 2 divisors, whose sum is σ = 79206871638. Its totient is φ = 79206871636.

The previous prime is 79206871613. The next prime is 79206871693. The reversal of 79206871637 is 73617860297.

It is an a-pointer prime, because the next prime (79206871693) can be obtained adding 79206871637 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62639577841 + 16567293796 = 250279^2 + 128714^2 .

It is a cyclic number.

It is not a de Polignac number, because 79206871637 - 2¹⁴ = 79206855253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79206871607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39603435818 + 39603435819.

It is an arithmetic number, because the mean of its divisors is an integer number (39603435819).

Almost surely, 2^79206871637 is an apocalyptic number.

It is an amenable number.

79206871637 is a deficient number, since it is larger than the sum of its proper divisors (1).

79206871637 is an equidigital number, since it uses as much as digits as its factorization.

79206871637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 79206871637 in words is "seventy-nine billion, two hundred six million, eight hundred seventy-one thousand, six hundred thirty-seven".