30666173 has 2 divisors, whose sum is σ = 30666174. Its totient is φ = 30666172.

The previous prime is 30666149. The next prime is 30666187. The reversal of 30666173 is 37166603.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18983449 + 11682724 = 4357^2 + 3418^2 .

It is a cyclic number.

It is not a de Polignac number, because 30666173 - 2⁶ = 30666109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30666143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15333086 + 15333087.

It is an arithmetic number, because the mean of its divisors is an integer number (15333087).

Almost surely, 2^30666173 is an apocalyptic number.

It is an amenable number.

30666173 is a deficient number, since it is larger than the sum of its proper divisors (1).

30666173 is an equidigital number, since it uses as much as digits as its factorization.

30666173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 30666173 is about 5537.7046689039. The cubic root of 30666173 is about 313.0063828413.

The spelling of 30666173 in words is "thirty million, six hundred sixty-six thousand, one hundred seventy-three".