30344813 has 4 divisors (see below), whose sum is σ = 32129820. Its totient is φ = 28559808.

The previous prime is 30344791. The next prime is 30344819. The reversal of 30344813 is 31844303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31844303 = 263 ⋅121081.

It can be written as a sum of positive squares in 2 ways, for example, as 27478564 + 2866249 = 5242^2 + 1693^2 .

It is a cyclic number.

It is not a de Polignac number, because 30344813 - 2⁶ = 30344749 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 (30344819) 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, 892478 + ... + 892511.

It is an arithmetic number, because the mean of its divisors is an integer number (8032455).

Almost surely, 2^30344813 is an apocalyptic number.

It is an amenable number.

30344813 is a deficient number, since it is larger than the sum of its proper divisors (1785007).

30344813 is a wasteful number, since it uses less digits than its factorization.

30344813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785006.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 30344813 is about 5508.6126202520. The cubic root of 30344813 is about 311.9091787206.

The spelling of 30344813 in words is "thirty million, three hundred forty-four thousand, eight hundred thirteen".