634719736249 has 3 divisors (see below), whose sum is σ = 634720532943. Its totient is φ = 634718939556.

The previous prime is 634719736247. The next prime is 634719736291. The reversal of 634719736249 is 942637917436.

The square root of 634719736249 is 796693.

It is a perfect power (a square), and thus also a powerful number.

634719736249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 576316314025 + 58403422224 = 759155^2 + 241668^2 .

It is not a de Polignac number, because 634719736249 - 2¹ = 634719736247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634719736247) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 398347 + ... + 1195039.

It is an arithmetic number, because the mean of its divisors is an integer number (211573510981).

Almost surely, 2^634719736249 is an apocalyptic number.

634719736249 is the 796693-rd square number.

634719736249 is the 398347-th centered octagonal number.

It is an amenable number.

634719736249 is a deficient number, since it is larger than the sum of its proper divisors (796694).

634719736249 is an frugal number, since it uses more digits than its factorization.

634719736249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593386 (or 796693 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 61.

The spelling of 634719736249 in words is "six hundred thirty-four billion, seven hundred nineteen million, seven hundred thirty-six thousand, two hundred forty-nine".