194630819 has 2 divisors, whose sum is σ = 194630820. Its totient is φ = 194630818.

The previous prime is 194630759. The next prime is 194630827. The reversal of 194630819 is 918036491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194630819 - 2¹² = 194626723 is a prime.

It is a super-2 number, since 2×194630819² = 75762311409221522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (194630869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97315409 + 97315410.

It is an arithmetic number, because the mean of its divisors is an integer number (97315410).

Almost surely, 2^194630819 is an apocalyptic number.

194630819 is a deficient number, since it is larger than the sum of its proper divisors (1).

194630819 is an equidigital number, since it uses as much as digits as its factorization.

194630819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 194630819 is about 13951.0149809969. The cubic root of 194630819 is about 579.5228130180.

The spelling of 194630819 in words is "one hundred ninety-four million, six hundred thirty thousand, eight hundred nineteen".