30138663 has 4 divisors (see below), whose sum is σ = 40184888. Its totient is φ = 20092440.

The previous prime is 30138659. The next prime is 30138679. The reversal of 30138663 is 36683103.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30138663 - 2² = 30138659 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 30138663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30130663) 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, 5023108 + ... + 5023113.

It is an arithmetic number, because the mean of its divisors is an integer number (10046222).

Almost surely, 2^30138663 is an apocalyptic number.

30138663 is a deficient number, since it is larger than the sum of its proper divisors (10046225).

30138663 is a wasteful number, since it uses less digits than its factorization.

30138663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10046224.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 30138663 is about 5489.8691241231. The cubic root of 30138663 is about 311.2012462144.

The spelling of 30138663 in words is "thirty million, one hundred thirty-eight thousand, six hundred sixty-three".