122819278 has 4 divisors (see below), whose sum is σ = 184228920. Its totient is φ = 61409638.

The previous prime is 122819273. The next prime is 122819293. The reversal of 122819278 is 872918221.

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

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 self number, because there is not a number n which added to its sum of digits gives 122819278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122819273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30704818 + ... + 30704821.

It is an arithmetic number, because the mean of its divisors is an integer number (46057230).

Almost surely, 2^122819278 is an apocalyptic number.

122819278 is a deficient number, since it is larger than the sum of its proper divisors (61409642).

122819278 is an equidigital number, since it uses as much as digits as its factorization.

122819278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61409641.

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

The square root of 122819278 is about 11082.3859344457. The cubic root of 122819278 is about 497.0752962393.

The spelling of 122819278 in words is "one hundred twenty-two million, eight hundred nineteen thousand, two hundred seventy-eight".