30172293 has 6 divisors (see below), whose sum is σ = 43582214. Its totient is φ = 20114856.

The previous prime is 30172291. The next prime is 30172301. The reversal of 30172293 is 39227103.

30172293 is a `hidden beast` number, since 301 + 72 + 293 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21511044 + 8661249 = 4638^2 + 2943^2 .

It is not a de Polignac number, because 30172293 - 2¹ = 30172291 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30172291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1676230 + ... + 1676247.

Almost surely, 2^30172293 is an apocalyptic number.

It is an amenable number.

30172293 is a deficient number, since it is larger than the sum of its proper divisors (13409921).

30172293 is a wasteful number, since it uses less digits than its factorization.

30172293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352483 (or 3352480 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 30172293 is about 5492.9311847137. The cubic root of 30172293 is about 311.3169537098.

Adding to 30172293 its reverse (39227103), we get a palindrome (69399396).

The spelling of 30172293 in words is "thirty million, one hundred seventy-two thousand, two hundred ninety-three".