79257681229 has 2 divisors, whose sum is σ = 79257681230. Its totient is φ = 79257681228.

The previous prime is 79257681179. The next prime is 79257681281. The reversal of 79257681229 is 92218675297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78697080900 + 560600329 = 280530^2 + 23677^2 .

It is a cyclic number.

It is not a de Polignac number, because 79257681229 - 2¹⁹ = 79257156941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79257681929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39628840614 + 39628840615.

It is an arithmetic number, because the mean of its divisors is an integer number (39628840615).

Almost surely, 2^79257681229 is an apocalyptic number.

It is an amenable number.

79257681229 is a deficient number, since it is larger than the sum of its proper divisors (1).

79257681229 is an equidigital number, since it uses as much as digits as its factorization.

79257681229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 58.

The spelling of 79257681229 in words is "seventy-nine billion, two hundred fifty-seven million, six hundred eighty-one thousand, two hundred twenty-nine".