122738818 has 4 divisors (see below), whose sum is σ = 184108230. Its totient is φ = 61369408.

The previous prime is 122738801. The next prime is 122738839. The reversal of 122738818 is 818837221.

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

It can be written as a sum of positive squares in only one way, i.e., 105124009 + 17614809 = 10253^2 + 4197^2 .

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30684703 + ... + 30684706.

Almost surely, 2^122738818 is an apocalyptic number.

122738818 is a deficient number, since it is larger than the sum of its proper divisors (61369412).

122738818 is an equidigital number, since it uses as much as digits as its factorization.

122738818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61369411.

The product of its digits is 43008, while the sum is 40.

The square root of 122738818 is about 11078.7552549914. The cubic root of 122738818 is about 496.9667263801.

The spelling of 122738818 in words is "one hundred twenty-two million, seven hundred thirty-eight thousand, eight hundred eighteen".