30288989 has 2 divisors, whose sum is σ = 30288990. Its totient is φ = 30288988.

The previous prime is 30288961. The next prime is 30289027. The reversal of 30288989 is 98988203.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25836889 + 4452100 = 5083^2 + 2110^2 .

It is a cyclic number.

It is not a de Polignac number, because 30288989 - 2²⁰ = 29240413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30288959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15144494 + 15144495.

It is an arithmetic number, because the mean of its divisors is an integer number (15144495).

Almost surely, 2^30288989 is an apocalyptic number.

It is an amenable number.

30288989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30288989 is an equidigital number, since it uses as much as digits as its factorization.

30288989 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 47.

The square root of 30288989 is about 5503.5433131756. The cubic root of 30288989 is about 311.7177928399.

The spelling of 30288989 in words is "thirty million, two hundred eighty-eight thousand, nine hundred eighty-nine".