1220072089 has 2 divisors, whose sum is σ = 1220072090. Its totient is φ = 1220072088.

The previous prime is 1220072071. The next prime is 1220072131. The reversal of 1220072089 is 9802700221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1084582489 + 135489600 = 32933^2 + 11640^2 .

It is an emirp because it is prime and its reverse (9802700221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220072089 - 2⁵ = 1220072057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220072089.

It is not a weakly prime, because it can be changed into another prime (1220072039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610036044 + 610036045.

It is an arithmetic number, because the mean of its divisors is an integer number (610036045).

Almost surely, 2^1220072089 is an apocalyptic number.

It is an amenable number.

1220072089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220072089 is an equidigital number, since it uses as much as digits as its factorization.

1220072089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1220072089 is about 34929.5303289351. The cubic root of 1220072089 is about 1068.5507759747.

The spelling of 1220072089 in words is "one billion, two hundred twenty million, seventy-two thousand, eighty-nine".