30381293 has 4 divisors (see below), whose sum is σ = 30650268. Its totient is φ = 30112320.

The previous prime is 30381277. The next prime is 30381313. The reversal of 30381293 is 39218303.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4959529 + 25421764 = 2227^2 + 5042^2 .

It is a cyclic number.

It is not a de Polignac number, because 30381293 - 2⁴ = 30381277 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 (30381493) 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, 134318 + ... + 134543.

It is an arithmetic number, because the mean of its divisors is an integer number (7662567).

Almost surely, 2^30381293 is an apocalyptic number.

It is an amenable number.

30381293 is a deficient number, since it is larger than the sum of its proper divisors (268975).

30381293 is a wasteful number, since it uses less digits than its factorization.

30381293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268974.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 30381293 is about 5511.9228042490. The cubic root of 30381293 is about 312.0341192415.

Adding to 30381293 its reverse (39218303), we get a palindrome (69599596).

The spelling of 30381293 in words is "thirty million, three hundred eighty-one thousand, two hundred ninety-three".