30889118209 has 2 divisors, whose sum is σ = 30889118210. Its totient is φ = 30889118208.

The previous prime is 30889118179. The next prime is 30889118231. The reversal of 30889118209 is 90281198803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25166649600 + 5722468609 = 158640^2 + 75647^2 .

It is an emirp because it is prime and its reverse (90281198803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30889118209 - 2⁷ = 30889118081 is a prime.

It is not a weakly prime, because it can be changed into another prime (30889118009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15444559104 + 15444559105.

It is an arithmetic number, because the mean of its divisors is an integer number (15444559105).

Almost surely, 2^30889118209 is an apocalyptic number.

It is an amenable number.

30889118209 is a deficient number, since it is larger than the sum of its proper divisors (1).

30889118209 is an equidigital number, since it uses as much as digits as its factorization.

30889118209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 30889118209 in words is "thirty billion, eight hundred eighty-nine million, one hundred eighteen thousand, two hundred nine".