194503661 has 8 divisors (see below), whose sum is σ = 212608800. Its totient is φ = 176469040.

The previous prime is 194503651. The next prime is 194503711. The reversal of 194503661 is 166305491.

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

It is not a de Polignac number, because 194503661 - 2⁶ = 194503597 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 (194503601) 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 7 ways as a sum of consecutive naturals, for example, 11771 + ... + 22968.

It is an arithmetic number, because the mean of its divisors is an integer number (26576100).

Almost surely, 2^194503661 is an apocalyptic number.

194503661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

194503661 is a deficient number, since it is larger than the sum of its proper divisors (18105139).

194503661 is a wasteful number, since it uses less digits than its factorization.

194503661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35259.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 194503661 is about 13946.4569335728. The cubic root of 194503661 is about 579.3965791286.

The spelling of 194503661 in words is "one hundred ninety-four million, five hundred three thousand, six hundred sixty-one".