16434009 has 10 divisors (see below), whose sum is σ = 24549690. Its totient is φ = 10955952.

The previous prime is 16434001. The next prime is 16434049. The reversal of 16434009 is 90043461.

It can be written as a sum of positive squares in only one way, i.e., 8294400 + 8139609 = 2880^2 + 2853^2 .

It is not a de Polignac number, because 16434009 - 2³ = 16434001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (16434001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 101364 + ... + 101525.

It is an arithmetic number, because the mean of its divisors is an integer number (2454969).

Almost surely, 2^16434009 is an apocalyptic number.

It is an amenable number.

16434009 is a deficient number, since it is larger than the sum of its proper divisors (8115681).

16434009 is an equidigital number, since it uses as much as digits as its factorization.

16434009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202901 (or 202892 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 16434009 is about 4053.8881336317. Note that the first 3 decimals coincide. The cubic root of 16434009 is about 254.2423184042.

The spelling of 16434009 in words is "sixteen million, four hundred thirty-four thousand, nine".