16634009 has 8 divisors (see below), whose sum is σ = 19137408. Its totient is φ = 14162400.

The previous prime is 16633963. The next prime is 16634017. The reversal of 16634009 is 90043661.

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

It is not a de Polignac number, because 16634009 - 2⁸ = 16633753 is a prime.

It is a super-4 number, since 4×16634009⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16634309) 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, 6812 + ... + 8925.

It is an arithmetic number, because the mean of its divisors is an integer number (2392176).

Almost surely, 2^16634009 is an apocalyptic number.

It is an amenable number.

16634009 is a deficient number, since it is larger than the sum of its proper divisors (2503399).

16634009 is a wasteful number, since it uses less digits than its factorization.

16634009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15895.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 16634009 is about 4078.4812124123. The cubic root of 16634009 is about 255.2695291875.

The spelling of 16634009 in words is "sixteen million, six hundred thirty-four thousand, nine".