194465819 has 2 divisors, whose sum is σ = 194465820. Its totient is φ = 194465818.

The previous prime is 194465813. The next prime is 194465827. The reversal of 194465819 is 918564491.

194465819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 194465819 - 2²⁴ = 177688603 is a prime.

It is a super-2 number, since 2×194465819² = 75633909518681522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (194465813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97232909 + 97232910.

It is an arithmetic number, because the mean of its divisors is an integer number (97232910).

Almost surely, 2^194465819 is an apocalyptic number.

194465819 is a deficient number, since it is larger than the sum of its proper divisors (1).

194465819 is an equidigital number, since it uses as much as digits as its factorization.

194465819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The square root of 194465819 is about 13945.1001789159. The cubic root of 194465819 is about 579.3590015198.

The spelling of 194465819 in words is "one hundred ninety-four million, four hundred sixty-five thousand, eight hundred nineteen".