194630785 has 4 divisors (see below), whose sum is σ = 233556948. Its totient is φ = 155704624.

The previous prime is 194630759. The next prime is 194630819. The reversal of 194630785 is 587036491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587036491 = 31 ⋅18936661.

It can be written as a sum of positive squares in 2 ways, for example, as 59536656 + 135094129 = 7716^2 + 11623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194630785 is a prime.

It is a super-2 number, since 2×194630785² = 75762284939432450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 19463074 + ... + 19463083.

It is an arithmetic number, because the mean of its divisors is an integer number (58389237).

Almost surely, 2^194630785 is an apocalyptic number.

It is an amenable number.

194630785 is a deficient number, since it is larger than the sum of its proper divisors (38926163).

194630785 is an equidigital number, since it uses as much as digits as its factorization.

194630785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38926162.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 194630785 is about 13951.0137624475. The cubic root of 194630785 is about 579.5227792724.

The spelling of 194630785 in words is "one hundred ninety-four million, six hundred thirty thousand, seven hundred eighty-five".