122289718 has 4 divisors (see below), whose sum is σ = 183434580. Its totient is φ = 61144858.

The previous prime is 122289691. The next prime is 122289731. The reversal of 122289718 is 817982221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 817982221 = 7 ⋅116854603.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30572428 + ... + 30572431.

It is an arithmetic number, because the mean of its divisors is an integer number (45858645).

Almost surely, 2^122289718 is an apocalyptic number.

122289718 is a deficient number, since it is larger than the sum of its proper divisors (61144862).

122289718 is an equidigital number, since it uses as much as digits as its factorization.

122289718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61144861.

The product of its digits is 32256, while the sum is 40.

The square root of 122289718 is about 11058.4681579322. The cubic root of 122289718 is about 496.3598536482.

The spelling of 122289718 in words is "one hundred twenty-two million, two hundred eighty-nine thousand, seven hundred eighteen".