30491109 has 24 divisors (see below), whose sum is σ = 49076352. Its totient is φ = 18083520.

The previous prime is 30491101. The next prime is 30491113. The reversal of 30491109 is 90119403.

It is not a de Polignac number, because 30491109 - 2³ = 30491101 is a prime.

It is a super-3 number, since 3×30491109³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30491101) 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, 1377 + ... + 7929.

It is an arithmetic number, because the mean of its divisors is an integer number (2044848).

Almost surely, 2^30491109 is an apocalyptic number.

It is an amenable number.

30491109 is a deficient number, since it is larger than the sum of its proper divisors (18585243).

30491109 is a wasteful number, since it uses less digits than its factorization.

30491109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6617 (or 6614 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 30491109 is about 5521.8754966044. The cubic root of 30491109 is about 312.4096259199.

The spelling of 30491109 in words is "thirty million, four hundred ninety-one thousand, one hundred nine".