194986387 has 8 divisors (see below), whose sum is σ = 203646240. Its totient is φ = 186341760.

The previous prime is 194986367. The next prime is 194986391. The reversal of 194986387 is 783689491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 194986387 - 2²³ = 186597779 is a prime.

It is a super-2 number, since 2×194986387² = 76039382230627538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194986367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28189 + ... + 34417.

It is an arithmetic number, because the mean of its divisors is an integer number (25455780).

Almost surely, 2^194986387 is an apocalyptic number.

194986387 is a deficient number, since it is larger than the sum of its proper divisors (8659853).

194986387 is a wasteful number, since it uses less digits than its factorization.

194986387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7613.

The product of its digits is 2612736, while the sum is 55.

The square root of 194986387 is about 13963.7526116728. The cubic root of 194986387 is about 579.8755053843.

The spelling of 194986387 in words is "one hundred ninety-four million, nine hundred eighty-six thousand, three hundred eighty-seven".