634712699987 has 2 divisors, whose sum is σ = 634712699988. Its totient is φ = 634712699986.

The previous prime is 634712699977. The next prime is 634712700029. The reversal of 634712699987 is 789996217436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634712699987 - 2¹⁴ = 634712683603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634712699987.

It is not a weakly prime, because it can be changed into another prime (634712699917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317356349993 + 317356349994.

It is an arithmetic number, because the mean of its divisors is an integer number (317356349994).

Almost surely, 2^634712699987 is an apocalyptic number.

634712699987 is a deficient number, since it is larger than the sum of its proper divisors (1).

634712699987 is an equidigital number, since it uses as much as digits as its factorization.

634712699987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246903552, while the sum is 71.

The spelling of 634712699987 in words is "six hundred thirty-four billion, seven hundred twelve million, six hundred ninety-nine thousand, nine hundred eighty-seven".