8729456893 has 4 divisors (see below), whose sum is σ = 8731632960. Its totient is φ = 8727280828.

The previous prime is 8729456861. The next prime is 8729456909. The reversal of 8729456893 is 3986549278.

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: 3986549278 = 2 ⋅1993274639.

It is a cyclic number.

It is not a de Polignac number, because 8729456893 - 2⁵ = 8729456861 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 (8729456993) 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, 1082005 + ... + 1090042.

It is an arithmetic number, because the mean of its divisors is an integer number (2182908240).

Almost surely, 2^8729456893 is an apocalyptic number.

It is an amenable number.

8729456893 is a deficient number, since it is larger than the sum of its proper divisors (2176067).

8729456893 is a wasteful number, since it uses less digits than its factorization.

8729456893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176066.

The product of its digits is 26127360, while the sum is 61.

The square root of 8729456893 is about 93431.5626167089. The cubic root of 8729456893 is about 2059.0287384940.

The spelling of 8729456893 in words is "eight billion, seven hundred twenty-nine million, four hundred fifty-six thousand, eight hundred ninety-three".