1222345779 has 16 divisors (see below), whose sum is σ = 1718169600. Its totient is φ = 771828480.

The previous prime is 1222345763. The next prime is 1222345783. The reversal of 1222345779 is 9775432221.

It is not a de Polignac number, because 1222345779 - 2⁴ = 1222345763 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1222345779.

It is not an unprimeable number, because it can be changed into a prime (1222345279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135454 + ... + 144195.

It is an arithmetic number, because the mean of its divisors is an integer number (107385600).

Almost surely, 2^1222345779 is an apocalyptic number.

1222345779 is a deficient number, since it is larger than the sum of its proper divisors (495823821).

1222345779 is a wasteful number, since it uses less digits than its factorization.

1222345779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279730.

The product of its digits is 211680, while the sum is 42.

The square root of 1222345779 is about 34962.0619958263. The cubic root of 1222345779 is about 1069.2141372034.

The spelling of 1222345779 in words is "one billion, two hundred twenty-two million, three hundred forty-five thousand, seven hundred seventy-nine".