30805319 has 4 divisors (see below), whose sum is σ = 31027080. Its totient is φ = 30583560.

The previous prime is 30805297. The next prime is 30805331. The reversal of 30805319 is 91350803.

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 30805319 - 2²⁰ = 29756743 is a prime.

It is a super-2 number, since 2×30805319² = 1897935357383522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30805291 and 30805300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30805519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110672 + ... + 110949.

It is an arithmetic number, because the mean of its divisors is an integer number (7756770).

Almost surely, 2^30805319 is an apocalyptic number.

30805319 is a deficient number, since it is larger than the sum of its proper divisors (221761).

30805319 is a wasteful number, since it uses less digits than its factorization.

30805319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221760.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 30805319 is about 5550.2539581536. The cubic root of 30805319 is about 313.4790847740.

The spelling of 30805319 in words is "thirty million, eight hundred five thousand, three hundred nineteen".