494857457 has 4 divisors (see below), whose sum is σ = 495455220. Its totient is φ = 494259696.

The previous prime is 494857427. The next prime is 494857463. The reversal of 494857457 is 754758494.

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

It can be written as a sum of positive squares in 2 ways, for example, as 134768881 + 360088576 = 11609^2 + 18976^2 .

It is a cyclic number.

It is not a de Polignac number, because 494857457 - 2⁶ = 494857393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 494857399 and 494857408.

It is not an unprimeable number, because it can be changed into a prime (494857427) 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, 297638 + ... + 299295.

It is an arithmetic number, because the mean of its divisors is an integer number (123863805).

Almost surely, 2^494857457 is an apocalyptic number.

It is an amenable number.

494857457 is a deficient number, since it is larger than the sum of its proper divisors (597763).

494857457 is an equidigital number, since it uses as much as digits as its factorization.

494857457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597762.

The product of its digits is 5644800, while the sum is 53.

The square root of 494857457 is about 22245.3918149355. The cubic root of 494857457 is about 790.9700506976.

The spelling of 494857457 in words is "four hundred ninety-four million, eight hundred fifty-seven thousand, four hundred fifty-seven".