189710819 has 2 divisors, whose sum is σ = 189710820. Its totient is φ = 189710818.

The previous prime is 189710767. The next prime is 189710821. The reversal of 189710819 is 918017981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189710819 - 2¹⁶ = 189645283 is a prime.

It is a super-2 number, since 2×189710819² = 71980389691301522, which contains 22 as substring.

Together with 189710821, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189710819.

It is not a weakly prime, because it can be changed into another prime (189740819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94855409 + 94855410.

It is an arithmetic number, because the mean of its divisors is an integer number (94855410).

Almost surely, 2^189710819 is an apocalyptic number.

189710819 is a deficient number, since it is larger than the sum of its proper divisors (1).

189710819 is an equidigital number, since it uses as much as digits as its factorization.

189710819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 44.

The square root of 189710819 is about 13773.5550603321. Note that the first 3 decimals coincide. The cubic root of 189710819 is about 574.5978980786.

The spelling of 189710819 in words is "one hundred eighty-nine million, seven hundred ten thousand, eight hundred nineteen".