30109091 has 24 divisors (see below), whose sum is σ = 35033040. Its totient is φ = 25712640.

The previous prime is 30109039. The next prime is 30109097. The reversal of 30109091 is 19090103.

It is not a de Polignac number, because 30109091 - 2¹⁴ = 30092707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30109097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310355 + ... + 310451.

It is an arithmetic number, because the mean of its divisors is an integer number (1459710).

Almost surely, 2^30109091 is an apocalyptic number.

30109091 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

30109091 is a deficient number, since it is larger than the sum of its proper divisors (4923949).

30109091 is a wasteful number, since it uses less digits than its factorization.

30109091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 30109091 is about 5487.1751384478. The cubic root of 30109091 is about 311.0994295453.

Adding to 30109091 its reverse (19090103), we get a palindrome (49199194).

The spelling of 30109091 in words is "thirty million, one hundred nine thousand, ninety-one".