23085459721 has 3 divisors (see below), whose sum is σ = 23085611661. Its totient is φ = 23085307782.

The previous prime is 23085459707. The next prime is 23085459799. The reversal of 23085459721 is 12795458032.

The square root of 23085459721 is 151939.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-23085459721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23085456721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 75970 + ... + 227908.

It is an arithmetic number, because the mean of its divisors is an integer number (7695203887).

Almost surely, 2^23085459721 is an apocalyptic number.

23085459721 is the 151939-th square number.

23085459721 is the 75970-th centered octagonal number.

It is an amenable number.

23085459721 is a deficient number, since it is larger than the sum of its proper divisors (151940).

23085459721 is an frugal number, since it uses more digits than its factorization.

23085459721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303878 (or 151939 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 23085459721 in words is "twenty-three billion, eighty-five million, four hundred fifty-nine thousand, seven hundred twenty-one".