122779903 has 4 divisors (see below), whose sum is σ = 123515280. Its totient is φ = 122044528.

The previous prime is 122779901. The next prime is 122779907. The reversal of 122779903 is 309977221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309977221 = 1427 ⋅217223.

It is a cyclic number.

It is not a de Polignac number, because 122779903 - 2¹ = 122779901 is a prime.

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 Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122779901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367438 + ... + 367771.

It is an arithmetic number, because the mean of its divisors is an integer number (30878820).

Almost surely, 2^122779903 is an apocalyptic number.

122779903 is a deficient number, since it is larger than the sum of its proper divisors (735377).

122779903 is an equidigital number, since it uses as much as digits as its factorization.

122779903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735376.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 122779903 is about 11080.6093244009. The cubic root of 122779903 is about 497.0221709426.

The spelling of 122779903 in words is "one hundred twenty-two million, seven hundred seventy-nine thousand, nine hundred three".