1220117549 has 8 divisors (see below), whose sum is σ = 1395030528. Its totient is φ = 1045357200.

The previous prime is 1220117537. The next prime is 1220117567. The reversal of 1220117549 is 9457110221.

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 1220117549 - 2⁴ = 1220117533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220117449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20477 + ... + 53474.

It is an arithmetic number, because the mean of its divisors is an integer number (174378816).

Almost surely, 2^1220117549 is an apocalyptic number.

It is an amenable number.

1220117549 is a deficient number, since it is larger than the sum of its proper divisors (174912979).

1220117549 is an equidigital number, since it uses as much as digits as its factorization.

1220117549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76315.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1220117549 is about 34930.1810616550. The cubic root of 1220117549 is about 1068.5640472438.

The spelling of 1220117549 in words is "one billion, two hundred twenty million, one hundred seventeen thousand, five hundred forty-nine".