189478363 has 2 divisors, whose sum is σ = 189478364. Its totient is φ = 189478362.

The previous prime is 189478361. The next prime is 189478409. The reversal of 189478363 is 363874981.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (363874981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189478363 - 2¹ = 189478361 is a prime.

Together with 189478361, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (189478361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94739181 + 94739182.

It is an arithmetic number, because the mean of its divisors is an integer number (94739182).

Almost surely, 2^189478363 is an apocalyptic number.

189478363 is a deficient number, since it is larger than the sum of its proper divisors (1).

189478363 is an equidigital number, since it uses as much as digits as its factorization.

189478363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 189478363 is about 13765.1139842720. The cubic root of 189478363 is about 574.3631138571.

The spelling of 189478363 in words is "one hundred eighty-nine million, four hundred seventy-eight thousand, three hundred sixty-three".