634859345779 has 2 divisors, whose sum is σ = 634859345780. Its totient is φ = 634859345778.

The previous prime is 634859345777. The next prime is 634859345803. The reversal of 634859345779 is 977543958436.

634859345779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634859345779 - 2¹ = 634859345777 is a prime.

It is a super-3 number, since 3×634859345779³ (a number of 36 digits) contains 333 as substring.

Together with 634859345777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (634859345777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317429672889 + 317429672890.

It is an arithmetic number, because the mean of its divisors is an integer number (317429672890).

Almost surely, 2^634859345779 is an apocalyptic number.

634859345779 is a deficient number, since it is larger than the sum of its proper divisors (1).

634859345779 is an equidigital number, since it uses as much as digits as its factorization.

634859345779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 685843200, while the sum is 70.

The spelling of 634859345779 in words is "six hundred thirty-four billion, eight hundred fifty-nine million, three hundred forty-five thousand, seven hundred seventy-nine".