634946017 has 4 divisors (see below), whose sum is σ = 635001796. Its totient is φ = 634890240.

The previous prime is 634945991. The next prime is 634946029. The reversal of 634946017 is 710649436.

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 2 ways, for example, as 313962961 + 320983056 = 17719^2 + 17916^2 .

It is a cyclic number.

It is not a de Polignac number, because 634946017 - 2¹⁹ = 634421729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634946087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3984 + ... + 35857.

It is an arithmetic number, because the mean of its divisors is an integer number (158750449).

Almost surely, 2^634946017 is an apocalyptic number.

634946017 is the 15937-th heptagonal number.

It is an amenable number.

634946017 is a deficient number, since it is larger than the sum of its proper divisors (55779).

634946017 is a wasteful number, since it uses less digits than its factorization.

634946017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55778.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 634946017 is about 25198.1351889381. The cubic root of 634946017 is about 859.4994459596.

The spelling of 634946017 in words is "six hundred thirty-four million, nine hundred forty-six thousand, seventeen".