194987101 has 4 divisors (see below), whose sum is σ = 205249600. Its totient is φ = 184724604.

The previous prime is 194987099. The next prime is 194987113. The reversal of 194987101 is 101789491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 194987101 - 2¹ = 194987099 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 (194987141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5131221 + ... + 5131258.

It is an arithmetic number, because the mean of its divisors is an integer number (51312400).

Almost surely, 2^194987101 is an apocalyptic number.

It is an amenable number.

194987101 is a deficient number, since it is larger than the sum of its proper divisors (10262499).

194987101 is a wasteful number, since it uses less digits than its factorization.

194987101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10262498.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 194987101 is about 13963.7781778428. The cubic root of 194987101 is about 579.8762131783.

The spelling of 194987101 in words is "one hundred ninety-four million, nine hundred eighty-seven thousand, one hundred one".