30138349 has 4 divisors (see below), whose sum is σ = 31448736. Its totient is φ = 28827964.

The previous prime is 30138289. The next prime is 30138359. The reversal of 30138349 is 94383103.

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.

It is a cyclic number.

It is not a de Polignac number, because 30138349 - 2⁹ = 30137837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30138349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30138359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655159 + ... + 655204.

It is an arithmetic number, because the mean of its divisors is an integer number (7862184).

Almost surely, 2^30138349 is an apocalyptic number.

It is an amenable number.

30138349 is a deficient number, since it is larger than the sum of its proper divisors (1310387).

30138349 is a wasteful number, since it uses less digits than its factorization.

30138349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310386.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 30138349 is about 5489.8405259169. The cubic root of 30138349 is about 311.2001654594.

The spelling of 30138349 in words is "thirty million, one hundred thirty-eight thousand, three hundred forty-nine".