634871941807 has 2 divisors, whose sum is σ = 634871941808. Its totient is φ = 634871941806.

The previous prime is 634871941793. The next prime is 634871941817. The reversal of 634871941807 is 708149178436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634871941807 - 2¹¹ = 634871939759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634871941817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317435970903 + 317435970904.

It is an arithmetic number, because the mean of its divisors is an integer number (317435970904).

Almost surely, 2^634871941807 is an apocalyptic number.

634871941807 is a deficient number, since it is larger than the sum of its proper divisors (1).

634871941807 is an equidigital number, since it uses as much as digits as its factorization.

634871941807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 634871941807 in words is "six hundred thirty-four billion, eight hundred seventy-one million, nine hundred forty-one thousand, eight hundred seven".