16959434309 has 4 divisors (see below), whose sum is σ = 16959899616. Its totient is φ = 16958969004.

The previous prime is 16959434279. The next prime is 16959434417. The reversal of 16959434309 is 90343495961.

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.

It is a cyclic number.

It is not a de Polignac number, because 16959434309 - 2¹⁶ = 16959368773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16959434509) 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, 172859 + ... + 252584.

It is an arithmetic number, because the mean of its divisors is an integer number (4239974904).

Almost surely, 2^16959434309 is an apocalyptic number.

It is an amenable number.

16959434309 is a deficient number, since it is larger than the sum of its proper divisors (465307).

16959434309 is an equidigital number, since it uses as much as digits as its factorization.

16959434309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465306.

The product of its (nonzero) digits is 3149280, while the sum is 53.

The spelling of 16959434309 in words is "sixteen billion, nine hundred fifty-nine million, four hundred thirty-four thousand, three hundred nine".