30818089 has 4 divisors (see below), whose sum is σ = 30974724. Its totient is φ = 30661456.

The previous prime is 30818083. The next prime is 30818131. The reversal of 30818089 is 98081803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23619600 + 7198489 = 4860^2 + 2683^2 .

It is a cyclic number.

It is not a de Polignac number, because 30818089 - 2⁷ = 30817961 is a prime.

It is a super-2 number, since 2×30818089² = 1899509219223842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30818083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78022 + ... + 78415.

It is an arithmetic number, because the mean of its divisors is an integer number (7743681).

Almost surely, 2^30818089 is an apocalyptic number.

It is an amenable number.

30818089 is a deficient number, since it is larger than the sum of its proper divisors (156635).

30818089 is a wasteful number, since it uses less digits than its factorization.

30818089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156634.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 30818089 is about 5551.4042367675. The cubic root of 30818089 is about 313.5223952046.

The spelling of 30818089 in words is "thirty million, eight hundred eighteen thousand, eighty-nine".