491944594 has 4 divisors (see below), whose sum is σ = 737916894. Its totient is φ = 245972296.

The previous prime is 491944559. The next prime is 491944597. The reversal of 491944594 is 495449194.

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., 414733225 + 77211369 = 20365^2 + 8787^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (491944597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122986147 + ... + 122986150.

Almost surely, 2^491944594 is an apocalyptic number.

491944594 is a deficient number, since it is larger than the sum of its proper divisors (245972300).

491944594 is a wasteful number, since it uses less digits than its factorization.

491944594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245972299.

The product of its digits is 933120, while the sum is 49.

The square root of 491944594 is about 22179.8240299602. The cubic root of 491944594 is about 789.4150420571.

The spelling of 491944594 in words is "four hundred ninety-one million, nine hundred forty-four thousand, five hundred ninety-four".