30138653 has 4 divisors (see below), whose sum is σ = 30217728. Its totient is φ = 30059580.

The previous prime is 30138629. The next prime is 30138659. The reversal of 30138653 is 35683103.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35683103 = 5333 ⋅6691.

It is a cyclic number.

It is not a de Polignac number, because 30138653 - 2¹⁴ = 30122269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30138659) 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, 38963 + ... + 39728.

It is an arithmetic number, because the mean of its divisors is an integer number (7554432).

Almost surely, 2^30138653 is an apocalyptic number.

It is an amenable number.

30138653 is a deficient number, since it is larger than the sum of its proper divisors (79075).

30138653 is an equidigital number, since it uses as much as digits as its factorization.

30138653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79074.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 30138653 is about 5489.8682133545. The cubic root of 30138653 is about 311.2012117956.

The spelling of 30138653 in words is "thirty million, one hundred thirty-eight thousand, six hundred fifty-three".