309634 has 8 divisors (see below), whose sum is σ = 500220. Its totient is φ = 142896.

The previous prime is 309629. The next prime is 309637. The reversal of 309634 is 436903.

It can be written as a sum of positive squares in 2 ways, for example, as 286225 + 23409 = 535^2 + 153^2 .

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

It is an Ulam number.

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

It is a junction number, because it is equal to n+sod(n) for n = 309599 and 309608.

It is not an unprimeable number, because it can be changed into a prime (309637) by changing a digit.

309634 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5929 + ... + 5980.

2³⁰⁹⁶³⁴ is an apocalyptic number.

309634 is a deficient number, since it is larger than the sum of its proper divisors (190586).

309634 is a wasteful number, since it uses less digits than its factorization.

309634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11924.

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

The square root of 309634 is about 556.4476615100. The cubic root of 309634 is about 67.6523490729.

The spelling of 309634 in words is "three hundred nine thousand, six hundred thirty-four".