299993189 has 2 divisors, whose sum is σ = 299993190. Its totient is φ = 299993188.

The previous prime is 299993171. The next prime is 299993219. The reversal of 299993189 is 981399992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206870689 + 93122500 = 14383^2 + 9650^2 .

It is a cyclic number.

It is not a de Polignac number, because 299993189 - 2²⁸ = 31557733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (299993149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149996594 + 149996595.

It is an arithmetic number, because the mean of its divisors is an integer number (149996595).

Almost surely, 2^299993189 is an apocalyptic number.

It is an amenable number.

299993189 is a deficient number, since it is larger than the sum of its proper divisors (1).

299993189 is an equidigital number, since it uses as much as digits as its factorization.

299993189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2834352, while the sum is 59.

The square root of 299993189 is about 17320.3114579386. The cubic root of 299993189 is about 669.4278839240.

The spelling of 299993189 in words is "two hundred ninety-nine million, nine hundred ninety-three thousand, one hundred eighty-nine".