194460091 has 4 divisors (see below), whose sum is σ = 222240112. Its totient is φ = 166680072.

The previous prime is 194460083. The next prime is 194460137. The reversal of 194460091 is 190064491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 194460091 - 2³ = 194460083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194460031) 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, 13890000 + ... + 13890013.

It is an arithmetic number, because the mean of its divisors is an integer number (55560028).

Almost surely, 2^194460091 is an apocalyptic number.

194460091 is a deficient number, since it is larger than the sum of its proper divisors (27780021).

194460091 is an equidigital number, since it uses as much as digits as its factorization.

194460091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27780020.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 194460091 is about 13944.8948006071. The cubic root of 194460091 is about 579.3533131150.

The spelling of 194460091 in words is "one hundred ninety-four million, four hundred sixty thousand, ninety-one".