494774781 has 16 divisors (see below), whose sum is σ = 703033344. Its totient is φ = 308793584.

The previous prime is 494774779. The next prime is 494774807. The reversal of 494774781 is 187477494.

It is not a de Polignac number, because 494774781 - 2¹ = 494774779 is a prime.

It is a super-2 number, since 2×494774781² = 489604167827195922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494774701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73041 + ... + 79526.

It is an arithmetic number, because the mean of its divisors is an integer number (43939584).

Almost surely, 2^494774781 is an apocalyptic number.

It is an amenable number.

494774781 is a deficient number, since it is larger than the sum of its proper divisors (208258563).

494774781 is a wasteful number, since it uses less digits than its factorization.

494774781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152640.

The product of its digits is 1580544, while the sum is 51.

The square root of 494774781 is about 22243.5334648072. The cubic root of 494774781 is about 790.9259990344.

The spelling of 494774781 in words is "four hundred ninety-four million, seven hundred seventy-four thousand, seven hundred eighty-one".