634947 has 8 divisors (see below), whose sum is σ = 854544. Its totient is φ = 419328.

The previous prime is 634943. The next prime is 634969. The reversal of 634947 is 749436.

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

It is not a de Polignac number, because 634947 - 2² = 634943 is a prime.

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

634947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (634943) 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, 598 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (106818).

2⁶³⁴⁹⁴⁷ is an apocalyptic number.

634947 is a deficient number, since it is larger than the sum of its proper divisors (219597).

634947 is a wasteful number, since it uses less digits than its factorization.

634947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989.

The product of its digits is 18144, while the sum is 33.

The square root of 634947 is about 796.8356166739. The cubic root of 634947 is about 85.9499889508.

The spelling of 634947 in words is "six hundred thirty-four thousand, nine hundred forty-seven".