189550919 has 2 divisors, whose sum is σ = 189550920. Its totient is φ = 189550918.

The previous prime is 189550903. The next prime is 189550927. The reversal of 189550919 is 919055981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189550919 - 2⁴ = 189550903 is a prime.

It is a super-2 number, since 2×189550919² = 71859101787489122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189550939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94775459 + 94775460.

It is an arithmetic number, because the mean of its divisors is an integer number (94775460).

Almost surely, 2^189550919 is an apocalyptic number.

189550919 is a deficient number, since it is larger than the sum of its proper divisors (1).

189550919 is an equidigital number, since it uses as much as digits as its factorization.

189550919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 47.

The square root of 189550919 is about 13767.7492350783. The cubic root of 189550919 is about 574.4364171643.

The spelling of 189550919 in words is "one hundred eighty-nine million, five hundred fifty thousand, nine hundred nineteen".