30091189 has 2 divisors, whose sum is σ = 30091190. Its totient is φ = 30091188.

The previous prime is 30091177. The next prime is 30091211. The reversal of 30091189 is 98119003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19580625 + 10510564 = 4425^2 + 3242^2 .

It is an emirp because it is prime and its reverse (98119003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30091189 - 2²¹ = 27994037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30091189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30091169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15045594 + 15045595.

It is an arithmetic number, because the mean of its divisors is an integer number (15045595).

Almost surely, 2^30091189 is an apocalyptic number.

It is an amenable number.

30091189 is a deficient number, since it is larger than the sum of its proper divisors (1).

30091189 is an equidigital number, since it uses as much as digits as its factorization.

30091189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 30091189 is about 5485.5436375987. The cubic root of 30091189 is about 311.0377603955.

The spelling of 30091189 in words is "thirty million, ninety-one thousand, one hundred eighty-nine".