194159609 has 16 divisors (see below), whose sum is σ = 232560000. Its totient is φ = 161914032.

The previous prime is 194159597. The next prime is 194159621. The reversal of 194159609 is 906951491.

It is an interprime number because it is at equal distance from previous prime (194159597) and next prime (194159621).

It is not a de Polignac number, because 194159609 - 2¹² = 194155513 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 194159609.

It is not an unprimeable number, because it can be changed into a prime (194159809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5042 + ... + 20340.

It is an arithmetic number, because the mean of its divisors is an integer number (14535000).

Almost surely, 2^194159609 is an apocalyptic number.

It is an amenable number.

194159609 is a deficient number, since it is larger than the sum of its proper divisors (38400391).

194159609 is an equidigital number, since it uses as much as digits as its factorization.

194159609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15357 (or 15343 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 194159609 is about 13934.1167283757. The cubic root of 194159609 is about 579.0547514502.

The spelling of 194159609 in words is "one hundred ninety-four million, one hundred fifty-nine thousand, six hundred nine".