1223966005 has 4 divisors (see below), whose sum is σ = 1468759212. Its totient is φ = 979172800.

The previous prime is 1223965991. The next prime is 1223966041. The reversal of 1223966005 is 5006693221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 416894724 + 807071281 = 20418^2 + 28409^2 .

It is not a de Polignac number, because 1223966005 - 2⁵ = 1223965973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122396596 + ... + 122396605.

It is an arithmetic number, because the mean of its divisors is an integer number (367189803).

Almost surely, 2^1223966005 is an apocalyptic number.

It is an amenable number.

1223966005 is a deficient number, since it is larger than the sum of its proper divisors (244793207).

1223966005 is an equidigital number, since it uses as much as digits as its factorization.

1223966005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244793206.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1223966005 is about 34985.2255244982. The cubic root of 1223966005 is about 1069.6863450179.

The spelling of 1223966005 in words is "one billion, two hundred twenty-three million, nine hundred sixty-six thousand, five".