30188953 has 2 divisors, whose sum is σ = 30188954. Its totient is φ = 30188952.

The previous prime is 30188911. The next prime is 30188969. The reversal of 30188953 is 35988103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28643904 + 1545049 = 5352^2 + 1243^2 .

It is an emirp because it is prime and its reverse (35988103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30188953 - 2²¹ = 28091801 is a prime.

It is a super-2 number, since 2×30188953² = 1822745766472418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30188453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15094476 + 15094477.

It is an arithmetic number, because the mean of its divisors is an integer number (15094477).

Almost surely, 2^30188953 is an apocalyptic number.

It is an amenable number.

30188953 is a deficient number, since it is larger than the sum of its proper divisors (1).

30188953 is an equidigital number, since it uses as much as digits as its factorization.

30188953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 30188953 is about 5494.4474699464. The cubic root of 30188953 is about 311.3742423194.

The spelling of 30188953 in words is "thirty million, one hundred eighty-eight thousand, nine hundred fifty-three".