223454567779 has 4 divisors (see below), whose sum is σ = 223455912784. Its totient is φ = 223453222776.

The previous prime is 223454567731. The next prime is 223454567789. The reversal of 223454567779 is 977765454322.

223454567779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977765454322 = 2 ⋅488882727161.

It is a cyclic number.

It is not a de Polignac number, because 223454567779 - 2¹⁵ = 223454535011 is a prime.

It is a super-2 number, since 2×223454567779² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223454567719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381252 + ... + 769585.

It is an arithmetic number, because the mean of its divisors is an integer number (55863978196).

Almost surely, 2^223454567779 is an apocalyptic number.

223454567779 is a deficient number, since it is larger than the sum of its proper divisors (1345005).

223454567779 is a wasteful number, since it uses less digits than its factorization.

223454567779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345004.

The product of its digits is 88905600, while the sum is 61.

The spelling of 223454567779 in words is "two hundred twenty-three billion, four hundred fifty-four million, five hundred sixty-seven thousand, seven hundred seventy-nine".