789204934254221 has 4 divisors (see below), whose sum is σ = 835628753916252. Its totient is φ = 742781114592192.

The previous prime is 789204934254179. The next prime is 789204934254227. The reversal of 789204934254221 is 122452439402987.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 741426010681321 + 47778923572900 = 27229139^2 + 6912230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-789204934254221 is a prime.

It is a super-2 number, since 2×789204934254221² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (789204934254227) 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, 23211909830990 + ... + 23211909831023.

It is an arithmetic number, because the mean of its divisors is an integer number (208907188479063).

Almost surely, 2^{789204934254221} is an apocalyptic number.

It is an amenable number.

789204934254221 is a deficient number, since it is larger than the sum of its proper divisors (46423819662031).

789204934254221 is a wasteful number, since it uses less digits than its factorization.

789204934254221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46423819662030.

The product of its (nonzero) digits is 69672960, while the sum is 62.

The spelling of 789204934254221 in words is "seven hundred eighty-nine trillion, two hundred four billion, nine hundred thirty-four million, two hundred fifty-four thousand, two hundred twenty-one".