30090173 has 2 divisors, whose sum is σ = 30090174. Its totient is φ = 30090172.

The previous prime is 30090163. The next prime is 30090191. The reversal of 30090173 is 37109003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24581764 + 5508409 = 4958^2 + 2347^2 .

It is an emirp because it is prime and its reverse (37109003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30090173 - 2⁴ = 30090157 is a prime.

It is a super-2 number, since 2×30090173² = 1810837022339858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30090113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15045086 + 15045087.

It is an arithmetic number, because the mean of its divisors is an integer number (15045087).

Almost surely, 2^30090173 is an apocalyptic number.

It is an amenable number.

30090173 is a deficient number, since it is larger than the sum of its proper divisors (1).

30090173 is an equidigital number, since it uses as much as digits as its factorization.

30090173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 23.

The square root of 30090173 is about 5485.4510297696. The cubic root of 30090173 is about 311.0342597260.

Adding to 30090173 its reverse (37109003), we get a palindrome (67199176).

The spelling of 30090173 in words is "thirty million, ninety thousand, one hundred seventy-three".