494439697 has 4 divisors (see below), whose sum is σ = 496491556. Its totient is φ = 492387840.

The previous prime is 494439667. The next prime is 494439721. The reversal of 494439697 is 796934494.

It is a Cunningham number, because it is equal to 22236²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796934494 = 2 ⋅398467247.

It can be written as a sum of positive squares in 2 ways, for example, as 371872656 + 122567041 = 19284^2 + 11071^2 .

It is a cyclic number.

It is not a de Polignac number, because 494439697 - 2¹⁵ = 494406929 is a prime.

It is a super-2 number, since 2×494439697² = 488941227938903618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494439637) 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, 1025568 + ... + 1026049.

It is an arithmetic number, because the mean of its divisors is an integer number (124122889).

Almost surely, 2^494439697 is an apocalyptic number.

It is an amenable number.

494439697 is a deficient number, since it is larger than the sum of its proper divisors (2051859).

494439697 is a wasteful number, since it uses less digits than its factorization.

494439697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051858.

The product of its digits is 5878656, while the sum is 55.

The square root of 494439697 is about 22236.0000224861. Note that the first 4 decimals coincide. The cubic root of 494439697 is about 790.7474083506.

The spelling of 494439697 in words is "four hundred ninety-four million, four hundred thirty-nine thousand, six hundred ninety-seven".