83968730609 has 4 divisors (see below), whose sum is σ = 83969422320. Its totient is φ = 83968038900.

The previous prime is 83968730591. The next prime is 83968730621. The reversal of 83968730609 is 90603786938.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83968730609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83968730689) 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, 110279 + ... + 424380.

It is an arithmetic number, because the mean of its divisors is an integer number (20992355580).

Almost surely, 2^83968730609 is an apocalyptic number.

It is an amenable number.

83968730609 is a deficient number, since it is larger than the sum of its proper divisors (691711).

83968730609 is a wasteful number, since it uses less digits than its factorization.

83968730609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691710.

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 83968730609 in words is "eighty-three billion, nine hundred sixty-eight million, seven hundred thirty thousand, six hundred nine".