30343993 has 4 divisors (see below), whose sum is σ = 30565620. Its totient is φ = 30122368.

The previous prime is 30343991. The next prime is 30344029. The reversal of 30343993 is 39934303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39934303 = 907 ⋅44029.

It can be written as a sum of positive squares in 2 ways, for example, as 17405584 + 12938409 = 4172^2 + 3597^2 .

It is a cyclic number.

It is not a de Polignac number, because 30343993 - 2¹ = 30343991 is a prime.

It is a super-2 number, since 2×30343993² = 1841515822368098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30343991) 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, 110608 + ... + 110881.

It is an arithmetic number, because the mean of its divisors is an integer number (7641405).

Almost surely, 2^30343993 is an apocalyptic number.

It is an amenable number.

30343993 is a deficient number, since it is larger than the sum of its proper divisors (221627).

30343993 is a wasteful number, since it uses less digits than its factorization.

30343993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221626.

The product of its (nonzero) digits is 26244, while the sum is 34.

The square root of 30343993 is about 5508.5381908452. The cubic root of 30343993 is about 311.9063691484.

The spelling of 30343993 in words is "thirty million, three hundred forty-three thousand, nine hundred ninety-three".