30138065 has 4 divisors (see below), whose sum is σ = 36165684. Its totient is φ = 24110448.

The previous prime is 30138061. The next prime is 30138067. The reversal of 30138065 is 56083103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56083103 = 643 ⋅87221.

It can be written as a sum of positive squares in 2 ways, for example, as 23078416 + 7059649 = 4804^2 + 2657^2 .

It is a cyclic number.

It is not a de Polignac number, because 30138065 - 2² = 30138061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30138061) 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, 3013802 + ... + 3013811.

It is an arithmetic number, because the mean of its divisors is an integer number (9041421).

Almost surely, 2^30138065 is an apocalyptic number.

It is an amenable number.

30138065 is a deficient number, since it is larger than the sum of its proper divisors (6027619).

30138065 is an equidigital number, since it uses as much as digits as its factorization.

30138065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6027618.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 30138065 is about 5489.8146598952. The cubic root of 30138065 is about 311.1991879548.

The spelling of 30138065 in words is "thirty million, one hundred thirty-eight thousand, sixty-five".