494949493 has 4 divisors (see below), whose sum is σ = 495057388. Its totient is φ = 494841600.

The previous prime is 494949491. The next prime is 494949517. The reversal of 494949493 is 394949494.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 394949494 = 2 ⋅197474747.

It can be written as a sum of positive squares in 2 ways, for example, as 268206129 + 226743364 = 16377^2 + 15058^2 .

It is a cyclic number.

It is not a de Polignac number, because 494949493 - 2¹ = 494949491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494949491) 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, 46746 + ... + 56347.

It is an arithmetic number, because the mean of its divisors is an integer number (123764347).

Almost surely, 2^494949493 is an apocalyptic number.

It is an amenable number.

494949493 is a deficient number, since it is larger than the sum of its proper divisors (107895).

494949493 is a wasteful number, since it uses less digits than its factorization.

494949493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107894.

The product of its digits is 5038848, while the sum is 55.

The square root of 494949493 is about 22247.4603719166. The cubic root of 494949493 is about 791.0190838120.

Subtracting from 494949493 its reverse (394949494), we obtain a palindrome (99999999).

The spelling of 494949493 in words is "four hundred ninety-four million, nine hundred forty-nine thousand, four hundred ninety-three".