30423191 has 2 divisors, whose sum is σ = 30423192. Its totient is φ = 30423190.

The previous prime is 30423157. The next prime is 30423229. The reversal of 30423191 is 19132403.

It is a weak prime.

It is an emirp because it is prime and its reverse (19132403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30423191 - 2¹⁰ = 30422167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30423131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15211595 + 15211596.

It is an arithmetic number, because the mean of its divisors is an integer number (15211596).

Almost surely, 2^30423191 is an apocalyptic number.

30423191 is a deficient number, since it is larger than the sum of its proper divisors (1).

30423191 is an equidigital number, since it uses as much as digits as its factorization.

30423191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 30423191 is about 5515.7221648665. The cubic root of 30423191 is about 312.1774925591.

Adding to 30423191 its reverse (19132403), we get a palindrome (49555594).

The spelling of 30423191 in words is "thirty million, four hundred twenty-three thousand, one hundred ninety-one".