1220959183 has 4 divisors (see below), whose sum is σ = 1221222528. Its totient is φ = 1220695840.

The previous prime is 1220959153. The next prime is 1220959199. The reversal of 1220959183 is 3819590221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220959183 - 2²⁹ = 684088271 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220959153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124591 + ... + 134032.

It is an arithmetic number, because the mean of its divisors is an integer number (305305632).

Almost surely, 2^1220959183 is an apocalyptic number.

1220959183 is a deficient number, since it is larger than the sum of its proper divisors (263345).

1220959183 is an equidigital number, since it uses as much as digits as its factorization.

1220959183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263344.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1220959183 is about 34942.2263600933. The cubic root of 1220959183 is about 1068.8096883641.

The spelling of 1220959183 in words is "one billion, two hundred twenty million, nine hundred fifty-nine thousand, one hundred eighty-three".