79144894429 has 2 divisors, whose sum is σ = 79144894430. Its totient is φ = 79144894428.

The previous prime is 79144894417. The next prime is 79144894481. The reversal of 79144894429 is 92449844197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70029036900 + 9115857529 = 264630^2 + 95477^2 .

It is a cyclic number.

It is not a de Polignac number, because 79144894429 - 2⁵ = 79144894397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79144892429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39572447214 + 39572447215.

It is an arithmetic number, because the mean of its divisors is an integer number (39572447215).

Almost surely, 2^79144894429 is an apocalyptic number.

It is an amenable number.

79144894429 is a deficient number, since it is larger than the sum of its proper divisors (1).

79144894429 is an equidigital number, since it uses as much as digits as its factorization.

79144894429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 61.

The spelling of 79144894429 in words is "seventy-nine billion, one hundred forty-four million, eight hundred ninety-four thousand, four hundred twenty-nine".