194480639 has 4 divisors (see below), whose sum is σ = 200754240. Its totient is φ = 188207040.

The previous prime is 194480633. The next prime is 194480659. The reversal of 194480639 is 936084491.

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 194480639 - 2¹² = 194476543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194480639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194480633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3136754 + ... + 3136815.

It is an arithmetic number, because the mean of its divisors is an integer number (50188560).

Almost surely, 2^194480639 is an apocalyptic number.

194480639 is a deficient number, since it is larger than the sum of its proper divisors (6273601).

194480639 is an equidigital number, since it uses as much as digits as its factorization.

194480639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6273600.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 194480639 is about 13945.6315382273. The cubic root of 194480639 is about 579.3737185574.

The spelling of 194480639 in words is "one hundred ninety-four million, four hundred eighty thousand, six hundred thirty-nine".