79436503849 has 2 divisors, whose sum is σ = 79436503850. Its totient is φ = 79436503848.

The previous prime is 79436503841. The next prime is 79436503871. The reversal of 79436503849 is 94830563497.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72694944400 + 6741559449 = 269620^2 + 82107^2 .

It is a cyclic number.

It is not a de Polignac number, because 79436503849 - 2³ = 79436503841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79436503793 and 79436503802.

It is not a weakly prime, because it can be changed into another prime (79436503841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39718251924 + 39718251925.

It is an arithmetic number, because the mean of its divisors is an integer number (39718251925).

Almost surely, 2^79436503849 is an apocalyptic number.

It is an amenable number.

79436503849 is a deficient number, since it is larger than the sum of its proper divisors (1).

79436503849 is an equidigital number, since it uses as much as digits as its factorization.

79436503849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 79436503849 in words is "seventy-nine billion, four hundred thirty-six million, five hundred three thousand, eight hundred forty-nine".