194949491 has 4 divisors (see below), whose sum is σ = 212672184. Its totient is φ = 177226800.

The previous prime is 194949379. The next prime is 194949497.

194949491 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194949491 is a prime.

It is a super-3 number, since 3×194949491³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194949497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8861330 + ... + 8861351.

It is an arithmetic number, because the mean of its divisors is an integer number (53168046).

Almost surely, 2^194949491 is an apocalyptic number.

194949491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

194949491 is a deficient number, since it is larger than the sum of its proper divisors (17722693).

194949491 is a wasteful number, since it uses less digits than its factorization.

194949491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17722692.

The product of its digits is 419904, while the sum is 50.

The square root of 194949491 is about 13962.4314143347. The cubic root of 194949491 is about 579.8389277261.

The spelling of 194949491 in words is "one hundred ninety-four million, nine hundred forty-nine thousand, four hundred ninety-one".