30930191 has 4 divisors (see below), whose sum is σ = 32749632. Its totient is φ = 29110752.

The previous prime is 30930143. The next prime is 30930203. The reversal of 30930191 is 19103903.

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

It is a cyclic number.

It is not a de Polignac number, because 30930191 - 2⁶ = 30930127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30930191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30930121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909695 + ... + 909728.

It is an arithmetic number, because the mean of its divisors is an integer number (8187408).

Almost surely, 2^30930191 is an apocalyptic number.

30930191 is a deficient number, since it is larger than the sum of its proper divisors (1819441).

30930191 is a wasteful number, since it uses less digits than its factorization.

30930191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819440.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 30930191 is about 5561.4917962719. The cubic root of 30930191 is about 313.9020851748.

The spelling of 30930191 in words is "thirty million, nine hundred thirty thousand, one hundred ninety-one".