189478519 has 2 divisors, whose sum is σ = 189478520. Its totient is φ = 189478518.

The previous prime is 189478463. The next prime is 189478529. The reversal of 189478519 is 915874981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189478519 - 2¹¹ = 189476471 is a prime.

It is a super-2 number, since 2×189478519² = 71804218324866722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189478529) 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, 94739259 + 94739260.

It is an arithmetic number, because the mean of its divisors is an integer number (94739260).

Almost surely, 2^189478519 is an apocalyptic number.

189478519 is a deficient number, since it is larger than the sum of its proper divisors (1).

189478519 is an equidigital number, since it uses as much as digits as its factorization.

189478519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 52.

The square root of 189478519 is about 13765.1196507695. The cubic root of 189478519 is about 574.3632714839.

The spelling of 189478519 in words is "one hundred eighty-nine million, four hundred seventy-eight thousand, five hundred nineteen".