634345 has 8 divisors (see below), whose sum is σ = 765576. Its totient is φ = 504576.

The previous prime is 634343. The next prime is 634367. The reversal of 634345 is 543436.

It can be written as a sum of positive squares in 4 ways, for example, as 85264 + 549081 = 292^2 + 741^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 634345 - 2¹ = 634343 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 3⁹ + 3¹² + 4⁷ + 4⁸ + 5 .

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1249 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (95697).

2⁶³⁴³⁴⁵ is an apocalyptic number.

It is an amenable number.

634345 is a deficient number, since it is larger than the sum of its proper divisors (131231).

634345 is a wasteful number, since it uses less digits than its factorization.

634345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

The product of its digits is 4320, while the sum is 25.

The square root of 634345 is about 796.4577829364. The cubic root of 634345 is about 85.9228169956.

Subtracting from 634345 its reverse (543436), we obtain a palindrome (90909).

It can be divided in two parts, 634 and 345, that added together give a palindrome (979).

The spelling of 634345 in words is "six hundred thirty-four thousand, three hundred forty-five".