30445309 has 4 divisors (see below), whose sum is σ = 30664480. Its totient is φ = 30226140.

The previous prime is 30445291. The next prime is 30445381. The reversal of 30445309 is 90354403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90354403 = 2549 ⋅35447.

It is a cyclic number.

It is not a de Polignac number, because 30445309 - 2⁹ = 30444797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30445109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109377 + ... + 109654.

It is an arithmetic number, because the mean of its divisors is an integer number (7666120).

Almost surely, 2^30445309 is an apocalyptic number.

It is an amenable number.

30445309 is a deficient number, since it is larger than the sum of its proper divisors (219171).

30445309 is a wasteful number, since it uses less digits than its factorization.

30445309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219170.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 30445309 is about 5517.7267964262. The cubic root of 30445309 is about 312.2531264090.

The spelling of 30445309 in words is "thirty million, four hundred forty-five thousand, three hundred nine".