194889487 has 16 divisors (see below), whose sum is σ = 214452000. Its totient is φ = 176020992.

The previous prime is 194889481. The next prime is 194889521. The reversal of 194889487 is 784988491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194889487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194889481) 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 15 ways as a sum of consecutive naturals, for example, 129264 + ... + 130762.

It is an arithmetic number, because the mean of its divisors is an integer number (13403250).

Almost surely, 2^194889487 is an apocalyptic number.

194889487 is a deficient number, since it is larger than the sum of its proper divisors (19562513).

194889487 is a wasteful number, since it uses less digits than its factorization.

194889487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722.

The product of its digits is 4644864, while the sum is 58.

The square root of 194889487 is about 13960.2824828153. The cubic root of 194889487 is about 579.7794315884.

The spelling of 194889487 in words is "one hundred ninety-four million, eight hundred eighty-nine thousand, four hundred eighty-seven".