634997 has 4 divisors (see below), whose sum is σ = 692736. Its totient is φ = 577260.

The previous prime is 634979. The next prime is 635003. The reversal of 634997 is 799436.

634997 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 634997 - 2⁸ = 634741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28853 + ... + 28874.

It is an arithmetic number, because the mean of its divisors is an integer number (173184).

2⁶³⁴⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

634997 is a deficient number, since it is larger than the sum of its proper divisors (57739).

634997 is a wasteful number, since it uses less digits than its factorization.

634997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57738.

The product of its digits is 40824, while the sum is 38.

The square root of 634997 is about 796.8669901558. The cubic root of 634997 is about 85.9522449851.

It can be divided in two parts, 6349 and 97, that added together give a palindrome (6446).

The spelling of 634997 in words is "six hundred thirty-four thousand, nine hundred ninety-seven".