1220948863 has 8 divisors (see below), whose sum is σ = 1244669328. Its totient is φ = 1197253824.

The previous prime is 1220948843. The next prime is 1220948887. The reversal of 1220948863 is 3688490221.

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 1220948863 - 2⁵ = 1220948831 is a prime.

It is a super-2 number, since 2×1220948863² = 2981432252121985538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220948803) 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, 111531 + ... + 121987.

It is an arithmetic number, because the mean of its divisors is an integer number (155583666).

Almost surely, 2^1220948863 is an apocalyptic number.

1220948863 is a deficient number, since it is larger than the sum of its proper divisors (23720465).

1220948863 is a wasteful number, since it uses less digits than its factorization.

1220948863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12713.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1220948863 is about 34942.0786874508. The cubic root of 1220948863 is about 1068.8066770303.

The spelling of 1220948863 in words is "one billion, two hundred twenty million, nine hundred forty-eight thousand, eight hundred sixty-three".