188994893 has 2 divisors, whose sum is σ = 188994894. Its totient is φ = 188994892.

The previous prime is 188994889. The next prime is 188994929. The reversal of 188994893 is 398499881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188980009 + 14884 = 13747^2 + 122^2 .

It is a cyclic number.

It is not a de Polignac number, because 188994893 - 2² = 188994889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188994833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94497446 + 94497447.

It is an arithmetic number, because the mean of its divisors is an integer number (94497447).

Almost surely, 2^188994893 is an apocalyptic number.

It is an amenable number.

188994893 is a deficient number, since it is larger than the sum of its proper divisors (1).

188994893 is an equidigital number, since it uses as much as digits as its factorization.

188994893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 59.

The square root of 188994893 is about 13747.5413438185. The cubic root of 188994893 is about 573.8741858224.

The spelling of 188994893 in words is "one hundred eighty-eight million, nine hundred ninety-four thousand, eight hundred ninety-three".