1220329979 has 8 divisors (see below), whose sum is σ = 1331639472. Its totient is φ = 1109082240.

The previous prime is 1220329939. The next prime is 1220329987. The reversal of 1220329979 is 9799230221.

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 1220329979 - 2²⁰ = 1219281403 is a prime.

It is a super-2 number, since 2×1220329979² = 2978410515292280882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220329939) 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, 32327 + ... + 59039.

It is an arithmetic number, because the mean of its divisors is an integer number (166454934).

Almost surely, 2^1220329979 is an apocalyptic number.

1220329979 is a deficient number, since it is larger than the sum of its proper divisors (111309493).

1220329979 is a wasteful number, since it uses less digits than its factorization.

1220329979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30877.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 1220329979 is about 34933.2217094273. The cubic root of 1220329979 is about 1068.6260581783.

The spelling of 1220329979 in words is "one billion, two hundred twenty million, three hundred twenty-nine thousand, nine hundred seventy-nine".