30494939 has 4 divisors (see below), whose sum is σ = 31238760. Its totient is φ = 29751120.

The previous prime is 30494909. The next prime is 30494951. The reversal of 30494939 is 93949403.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93949403 = 179 ⋅524857.

It is a cyclic number.

It is not a de Polignac number, because 30494939 - 2⁸ = 30494683 is a prime.

It is a super-2 number, since 2×30494939² = 1859882609227442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 743779 = 30494939 / (3 + 0 + 4 + 9 + 4 + 9 + 3 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30494896 and 30494905.

It is not an unprimeable number, because it can be changed into a prime (30494909) 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, 371849 + ... + 371930.

It is an arithmetic number, because the mean of its divisors is an integer number (7809690).

Almost surely, 2^30494939 is an apocalyptic number.

30494939 is a deficient number, since it is larger than the sum of its proper divisors (743821).

30494939 is an equidigital number, since it uses as much as digits as its factorization.

30494939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743820.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 30494939 is about 5522.2222881735. Note that the first 4 decimals coincide. The cubic root of 30494939 is about 312.4227060036.

The spelling of 30494939 in words is "thirty million, four hundred ninety-four thousand, nine hundred thirty-nine".