194638007 has 4 divisors (see below), whose sum is σ = 197828856. Its totient is φ = 191447160.

The previous prime is 194638001. The next prime is 194638021. The reversal of 194638007 is 700836491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 194638007 - 2¹² = 194633911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194638001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1595333 + ... + 1595454.

It is an arithmetic number, because the mean of its divisors is an integer number (49457214).

Almost surely, 2^194638007 is an apocalyptic number.

194638007 is a deficient number, since it is larger than the sum of its proper divisors (3190849).

194638007 is an equidigital number, since it uses as much as digits as its factorization.

194638007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3190848.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 194638007 is about 13951.2725942833. The cubic root of 194638007 is about 579.5299471377.

The spelling of 194638007 in words is "one hundred ninety-four million, six hundred thirty-eight thousand, seven".