194009473 has 12 divisors (see below), whose sum is σ = 227207700. Its totient is φ = 165171552.

The previous prime is 194009447. The next prime is 194009503. The reversal of 194009473 is 374900491.

It can be written as a sum of positive squares in 2 ways, for example, as 127961344 + 66048129 = 11312^2 + 8127^2 .

It is a de Polignac number, because none of the positive numbers 2^k-194009473 is a prime.

It is a super-2 number, since 2×194009473² = 75279351227475458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194009443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5986 + ... + 20587.

It is an arithmetic number, because the mean of its divisors is an integer number (18933975).

Almost surely, 2^194009473 is an apocalyptic number.

It is an amenable number.

194009473 is a deficient number, since it is larger than the sum of its proper divisors (33198227).

194009473 is a wasteful number, since it uses less digits than its factorization.

194009473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26736 (or 26729 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 194009473 is about 13928.7283339148. The cubic root of 194009473 is about 578.9054595308.

The spelling of 194009473 in words is "one hundred ninety-four million, nine thousand, four hundred seventy-three".