1223940005 has 16 divisors (see below), whose sum is σ = 1552219200. Its totient is φ = 923904000.

The previous prime is 1223939957. The next prime is 1223940017. The reversal of 1223940005 is 5000493221.

It is a de Polignac number, because none of the positive numbers 2^k-1223940005 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1820 + ... + 49509.

It is an arithmetic number, because the mean of its divisors is an integer number (97013700).

Almost surely, 2^1223940005 is an apocalyptic number.

It is an amenable number.

1223940005 is a deficient number, since it is larger than the sum of its proper divisors (328279195).

1223940005 is a wasteful number, since it uses less digits than its factorization.

1223940005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51604.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1223940005 is about 34984.8539370968. The cubic root of 1223940005 is about 1069.6787707220.

The spelling of 1223940005 in words is "one billion, two hundred twenty-three million, nine hundred forty thousand, five".