728606342073 has 4 divisors (see below), whose sum is σ = 971475122768. Its totient is φ = 485737561380.

The previous prime is 728606342039. The next prime is 728606342083. The reversal of 728606342073 is 370243606827.

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: 370243606827 = 3 ⋅123414535609.

It is not a de Polignac number, because 728606342073 - 2⁸ = 728606341817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728606342083) 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, 121434390343 + ... + 121434390348.

It is an arithmetic number, because the mean of its divisors is an integer number (242868780692).

Almost surely, 2^728606342073 is an apocalyptic number.

It is an amenable number.

728606342073 is a deficient number, since it is larger than the sum of its proper divisors (242868780695).

728606342073 is a wasteful number, since it uses less digits than its factorization.

728606342073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242868780694.

The product of its (nonzero) digits is 2032128, while the sum is 48.

The spelling of 728606342073 in words is "seven hundred twenty-eight billion, six hundred six million, three hundred forty-two thousand, seventy-three".