194659381 has 4 divisors (see below), whose sum is σ = 222467872. Its totient is φ = 166850892.

The previous prime is 194659363. The next prime is 194659403. The reversal of 194659381 is 183956491.

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 194659381 - 2¹³ = 194651189 is a prime.

It is a super-2 number, since 2×194659381² = 75784549222606322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194659481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13904235 + ... + 13904248.

It is an arithmetic number, because the mean of its divisors is an integer number (55616968).

Almost surely, 2^194659381 is an apocalyptic number.

It is an amenable number.

194659381 is a deficient number, since it is larger than the sum of its proper divisors (27808491).

194659381 is an equidigital number, since it uses as much as digits as its factorization.

194659381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27808490.

The product of its digits is 233280, while the sum is 46.

The square root of 194659381 is about 13952.0385965636. The cubic root of 194659381 is about 579.5511598835.

The spelling of 194659381 in words is "one hundred ninety-four million, six hundred fifty-nine thousand, three hundred eighty-one".