123344456779 has 4 divisors (see below), whose sum is σ = 126678090784. Its totient is φ = 120010822776.

The previous prime is 123344456773. The next prime is 123344456813. The reversal of 123344456779 is 977654443321.

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

It is a cyclic number.

It is not a de Polignac number, because 123344456779 - 2¹³ = 123344448587 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123344456773) 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, 1666816947 + ... + 1666817020.

It is an arithmetic number, because the mean of its divisors is an integer number (31669522696).

Almost surely, 2^123344456779 is an apocalyptic number.

123344456779 is a deficient number, since it is larger than the sum of its proper divisors (3333634005).

123344456779 is an equidigital number, since it uses as much as digits as its factorization.

123344456779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333634004.

The product of its digits is 15240960, while the sum is 55.

The spelling of 123344456779 in words is "one hundred twenty-three billion, three hundred forty-four million, four hundred fifty-six thousand, seven hundred seventy-nine".