1223456667 has 8 divisors (see below), whose sum is σ = 1632558096. Its totient is φ = 814996512.

The previous prime is 1223456653. The next prime is 1223456693. The reversal of 1223456667 is 7666543221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1223456667 - 2²⁰ = 1222408091 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1223456617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155848 + ... + 163509.

It is an arithmetic number, because the mean of its divisors is an integer number (204069762).

Almost surely, 2^1223456667 is an apocalyptic number.

1223456667 is a deficient number, since it is larger than the sum of its proper divisors (409101429).

1223456667 is a wasteful number, since it uses less digits than its factorization.

1223456667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320637.

The product of its digits is 362880, while the sum is 42.

The square root of 1223456667 is about 34977.9454370894. The cubic root of 1223456667 is about 1069.5379456087.

Adding to 1223456667 its reverse (7666543221), we get a palindrome (8889999888).

The spelling of 1223456667 in words is "one billion, two hundred twenty-three million, four hundred fifty-six thousand, six hundred sixty-seven".