30009081 has 4 divisors (see below), whose sum is σ = 40012112. Its totient is φ = 20006052.

The previous prime is 30009061. The next prime is 30009101. The reversal of 30009081 is 18090003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (30009061) and next prime (30009101).

It is not a de Polignac number, because 30009081 - 2²² = 25814777 is a prime.

It is a super-2 number, since 2×30009081² = 1801089884929122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30009061) 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, 5001511 + ... + 5001516.

It is an arithmetic number, because the mean of its divisors is an integer number (10003028).

Almost surely, 2^30009081 is an apocalyptic number.

It is an amenable number.

30009081 is a deficient number, since it is larger than the sum of its proper divisors (10003031).

30009081 is a wasteful number, since it uses less digits than its factorization.

30009081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003030.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 30009081 is about 5478.0544904190. The cubic root of 30009081 is about 310.7545994085.

Adding to 30009081 its reverse (18090003), we get a palindrome (48099084).

The spelling of 30009081 in words is "thirty million, nine thousand, eighty-one".