494438977 has 4 divisors (see below), whose sum is σ = 502544596. Its totient is φ = 486333360.

The previous prime is 494438963. The next prime is 494439007. The reversal of 494438977 is 779834494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 779834494 = 2 ⋅389917247.

It can be written as a sum of positive squares in 2 ways, for example, as 121022001 + 373416976 = 11001^2 + 19324^2 .

It is a cyclic number.

It is not a de Polignac number, because 494438977 - 2⁷ = 494438849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (494438927) 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, 4052718 + ... + 4052839.

It is an arithmetic number, because the mean of its divisors is an integer number (125636149).

Almost surely, 2^494438977 is an apocalyptic number.

It is an amenable number.

494438977 is a deficient number, since it is larger than the sum of its proper divisors (8105619).

494438977 is an equidigital number, since it uses as much as digits as its factorization.

494438977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8105618.

The product of its digits is 6096384, while the sum is 55.

The square root of 494438977 is about 22235.9838325180. The cubic root of 494438977 is about 790.7470245233.

The spelling of 494438977 in words is "four hundred ninety-four million, four hundred thirty-eight thousand, nine hundred seventy-seven".