1220234879 has 2 divisors, whose sum is σ = 1220234880. Its totient is φ = 1220234878.

The previous prime is 1220234867. The next prime is 1220234881. The reversal of 1220234879 is 9784320221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220234879 - 2⁸ = 1220234623 is a prime.

Together with 1220234881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220204879) by changing a digit.

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 as a sum of consecutive naturals, namely, 610117439 + 610117440.

It is an arithmetic number, because the mean of its divisors is an integer number (610117440).

Almost surely, 2^1220234879 is an apocalyptic number.

1220234879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220234879 is an equidigital number, since it uses as much as digits as its factorization.

1220234879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1220234879 is about 34931.8605144358. The cubic root of 1220234879 is about 1068.5982982062.

The spelling of 1220234879 in words is "one billion, two hundred twenty million, two hundred thirty-four thousand, eight hundred seventy-nine".