16900017209 has 4 divisors (see below), whose sum is σ = 16919071104. Its totient is φ = 16880963316.

The previous prime is 16900017193. The next prime is 16900017223. The reversal of 16900017209 is 90271000961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90271000961 = 3803 ⋅23736787.

It is a cyclic number.

It is not a de Polignac number, because 16900017209 - 2⁴ = 16900017193 is a prime.

It is a super-2 number, since 2×16900017209² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16900017269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9525617 + ... + 9527390.

It is an arithmetic number, because the mean of its divisors is an integer number (4229767776).

Almost surely, 2^16900017209 is an apocalyptic number.

It is an amenable number.

16900017209 is a deficient number, since it is larger than the sum of its proper divisors (19053895).

16900017209 is an equidigital number, since it uses as much as digits as its factorization.

16900017209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19053894.

The product of its (nonzero) digits is 6804, while the sum is 35.

The spelling of 16900017209 in words is "sixteen billion, nine hundred million, seventeen thousand, two hundred nine".