1220319289 has 16 divisors (see below), whose sum is σ = 1469104000. Its totient is φ = 990226944.

The previous prime is 1220319277. The next prime is 1220319293. The reversal of 1220319289 is 9829130221.

It is not a de Polignac number, because 1220319289 - 2¹⁷ = 1220188217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220319209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265987 + ... + 270535.

It is an arithmetic number, because the mean of its divisors is an integer number (91819000).

Almost surely, 2^1220319289 is an apocalyptic number.

1220319289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1220319289 is a deficient number, since it is larger than the sum of its proper divisors (248784711).

1220319289 is a wasteful number, since it uses less digits than its factorization.

1220319289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6592.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1220319289 is about 34933.0687028781. The cubic root of 1220319289 is about 1068.6229378075.

The spelling of 1220319289 in words is "one billion, two hundred twenty million, three hundred nineteen thousand, two hundred eighty-nine".