491000194 has 4 divisors (see below), whose sum is σ = 736500294. Its totient is φ = 245500096.

The previous prime is 491000177. The next prime is 491000197.

491000194 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 451775025 + 39225169 = 21255^2 + 6263^2 .

It is not an unprimeable number, because it can be changed into a prime (491000197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122750047 + ... + 122750050.

Almost surely, 2^491000194 is an apocalyptic number.

491000194 is a deficient number, since it is larger than the sum of its proper divisors (245500100).

491000194 is a wasteful number, since it uses less digits than its factorization.

491000194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245500099.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 491000194 is about 22158.5241837086. The cubic root of 491000194 is about 788.9095643049.

It can be divided in two parts, 491000 and 194, that added together give a palindrome (491194).

The spelling of 491000194 in words is "four hundred ninety-one million, one hundred ninety-four", and thus it is an aban number.