242117889 has 16 divisors (see below), whose sum is σ = 351849792. Its totient is φ = 147198528.

The previous prime is 242117851. The next prime is 242117891. The reversal of 242117889 is 988711242.

242117889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 242117889 - 2⁷ = 242117761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242117889.

It is not an unprimeable number, because it can be changed into a prime (242117089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34162 + ... + 40635.

It is an arithmetic number, because the mean of its divisors is an integer number (21990612).

Almost surely, 2^242117889 is an apocalyptic number.

It is an amenable number.

242117889 is a deficient number, since it is larger than the sum of its proper divisors (109731903).

242117889 is a wasteful number, since it uses less digits than its factorization.

242117889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74896.

The product of its digits is 64512, while the sum is 42.

The square root of 242117889 is about 15560.1378207264. The cubic root of 242117889 is about 623.2691429859.

The spelling of 242117889 in words is "two hundred forty-two million, one hundred seventeen thousand, eight hundred eighty-nine".