1223949205 has 16 divisors (see below), whose sum is σ = 1554727680. Its totient is φ = 923404608.

The previous prime is 1223949197. The next prime is 1223949227. The reversal of 1223949205 is 5029493221.

It is a cyclic number.

It is not a de Polignac number, because 1223949205 - 2³ = 1223949197 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 91917 + ... + 104386.

It is an arithmetic number, because the mean of its divisors is an integer number (97170480).

Almost surely, 2^1223949205 is an apocalyptic number.

It is an amenable number.

1223949205 is a deficient number, since it is larger than the sum of its proper divisors (330778475).

1223949205 is a wasteful number, since it uses less digits than its factorization.

1223949205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196380.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1223949205 is about 34984.9854223208. The cubic root of 1223949205 is about 1069.6814508697.

The spelling of 1223949205 in words is "one billion, two hundred twenty-three million, nine hundred forty-nine thousand, two hundred five".