242720772889 has 9 divisors (see below), whose sum is σ = 282352665951. Its totient is φ = 208043420760.

The previous prime is 242720772859. The next prime is 242720772907. The reversal of 242720772889 is 988277027242.

The square root of 242720772889 is 492667.

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

It can be written as a sum of positive squares in only one way, i.e., 75030522889 + 167690250000 = 273917^2 + 409500^2 .

It is not a de Polignac number, because 242720772889 - 2¹⁵ = 242720740121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242720772839) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3413479 + ... + 3483859.

It is an arithmetic number, because the mean of its divisors is an integer number (31372518439).

Almost surely, 2^242720772889 is an apocalyptic number.

242720772889 is the 492667-th square number.

242720772889 is the 246334-th centered octagonal number.

It is an amenable number.

242720772889 is a deficient number, since it is larger than the sum of its proper divisors (39631893062).

242720772889 is an frugal number, since it uses more digits than its factorization.

242720772889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140776 (or 70388 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 58.

The spelling of 242720772889 in words is "two hundred forty-two billion, seven hundred twenty million, seven hundred seventy-two thousand, eight hundred eighty-nine".