1220194679 has 8 divisors (see below), whose sum is σ = 1342902672. Its totient is φ = 1099450240.

The previous prime is 1220194639. The next prime is 1220194693. The reversal of 1220194679 is 9764910221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220194679 - 2²⁸ = 951759223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220194639) 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 7 ways as a sum of consecutive naturals, for example, 489584 + ... + 492069.

It is an arithmetic number, because the mean of its divisors is an integer number (167862834).

Almost surely, 2^1220194679 is an apocalyptic number.

1220194679 is a deficient number, since it is larger than the sum of its proper divisors (122707993).

1220194679 is a wasteful number, since it uses less digits than its factorization.

1220194679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981777.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1220194679 is about 34931.2851037576. The cubic root of 1220194679 is about 1068.5865632733.

The spelling of 1220194679 in words is "one billion, two hundred twenty million, one hundred ninety-four thousand, six hundred seventy-nine".