634309 has 8 divisors (see below), whose sum is σ = 695520. Its totient is φ = 574896.

The previous prime is 634307. The next prime is 634313. The reversal of 634309 is 903436.

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

It is not a de Polignac number, because 634309 - 2¹ = 634307 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354 + ... + 1180.

It is an arithmetic number, because the mean of its divisors is an integer number (86940).

2⁶³⁴³⁰⁹ is an apocalyptic number.

It is an amenable number.

634309 is a deficient number, since it is larger than the sum of its proper divisors (61211).

634309 is a wasteful number, since it uses less digits than its factorization.

634309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 634309 is about 796.4351825478. The cubic root of 634309 is about 85.9211915500.

The spelling of 634309 in words is "six hundred thirty-four thousand, three hundred nine".