30493939 has 4 divisors (see below), whose sum is σ = 34850224. Its totient is φ = 26137656.

The previous prime is 30493933. The next prime is 30493963. The reversal of 30493939 is 93939403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93939403 = 8627 ⋅10889.

It is a cyclic number.

It is not a de Polignac number, because 30493939 - 2⁷ = 30493811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30493933) 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, 2178132 + ... + 2178145.

It is an arithmetic number, because the mean of its divisors is an integer number (8712556).

Almost surely, 2^30493939 is an apocalyptic number.

30493939 is a deficient number, since it is larger than the sum of its proper divisors (4356285).

30493939 is an equidigital number, since it uses as much as digits as its factorization.

30493939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356284.

The product of its (nonzero) digits is 78732, while the sum is 40.

The square root of 30493939 is about 5522.1317441727. The cubic root of 30493939 is about 312.4192909438.

The spelling of 30493939 in words is "thirty million, four hundred ninety-three thousand, nine hundred thirty-nine".