723828138209 has 24 divisors (see below), whose sum is σ = 842527927584. Its totient is φ = 619234070400.

The previous prime is 723828138167. The next prime is 723828138223. The reversal of 723828138209 is 902831828327.

It is a de Polignac number, because none of the positive numbers 2^k-723828138209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723828137209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18680834 + ... + 18719540.

It is an arithmetic number, because the mean of its divisors is an integer number (35105330316).

Almost surely, 2^723828138209 is an apocalyptic number.

It is an amenable number.

723828138209 is a deficient number, since it is larger than the sum of its proper divisors (118699789375).

723828138209 is a wasteful number, since it uses less digits than its factorization.

723828138209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47837 (or 47826 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 723828138209 in words is "seven hundred twenty-three billion, eight hundred twenty-eight million, one hundred thirty-eight thousand, two hundred nine".