194612643 has 6 divisors (see below), whose sum is σ = 281107164. Its totient is φ = 129741756.

The previous prime is 194612603. The next prime is 194612659. The reversal of 194612643 is 346216491.

194612643 is a `hidden beast` number, since 1 + 9 + 4 + 6 + 1 + 2 + 643 = 666.

It is not a de Polignac number, because 194612643 - 2¹³ = 194604451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 194612598 and 194612607.

It is not an unprimeable number, because it can be changed into a prime (194612603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10811805 + ... + 10811822.

It is an arithmetic number, because the mean of its divisors is an integer number (46851194).

Almost surely, 2^194612643 is an apocalyptic number.

194612643 is a deficient number, since it is larger than the sum of its proper divisors (86494521).

194612643 is a wasteful number, since it uses less digits than its factorization.

194612643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21623633 (or 21623630 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 194612643 is about 13950.3635436500. The cubic root of 194612643 is about 579.5047724791.

The spelling of 194612643 in words is "one hundred ninety-four million, six hundred twelve thousand, six hundred forty-three".