189885419 has 2 divisors, whose sum is σ = 189885420. Its totient is φ = 189885418.

The previous prime is 189885403. The next prime is 189885431. The reversal of 189885419 is 914588981.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (914588981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189885419 - 2⁴ = 189885403 is a prime.

It is a super-2 number, since 2×189885419² = 72112944697611122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189485419) 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, 94942709 + 94942710.

It is an arithmetic number, because the mean of its divisors is an integer number (94942710).

Almost surely, 2^189885419 is an apocalyptic number.

189885419 is a deficient number, since it is larger than the sum of its proper divisors (1).

189885419 is an equidigital number, since it uses as much as digits as its factorization.

189885419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 53.

The square root of 189885419 is about 13779.8918355697. The cubic root of 189885419 is about 574.7741207305.

The spelling of 189885419 in words is "one hundred eighty-nine million, eight hundred eighty-five thousand, four hundred nineteen".