728654613 has 4 divisors (see below), whose sum is σ = 971539488. Its totient is φ = 485769740.

The previous prime is 728654581. The next prime is 728654657. The reversal of 728654613 is 316456827.

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: 316456827 = 3 ⋅105485609.

It is a cyclic number.

It is not a de Polignac number, because 728654613 - 2⁵ = 728654581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728650613) 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, 121442433 + ... + 121442438.

It is an arithmetic number, because the mean of its divisors is an integer number (242884872).

Almost surely, 2^728654613 is an apocalyptic number.

It is an amenable number.

728654613 is a deficient number, since it is larger than the sum of its proper divisors (242884875).

728654613 is a wasteful number, since it uses less digits than its factorization.

728654613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242884874.

The product of its digits is 241920, while the sum is 42.

The square root of 728654613 is about 26993.6031866811. The cubic root of 728654613 is about 899.8578429793.

The spelling of 728654613 in words is "seven hundred twenty-eight million, six hundred fifty-four thousand, six hundred thirteen".