494778621 has 8 divisors (see below), whose sum is σ = 659882880. Its totient is φ = 329763392.

The previous prime is 494778619. The next prime is 494778637. The reversal of 494778621 is 126877494.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 494778621 - 2¹ = 494778619 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494778721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7980 + ... + 32453.

It is an arithmetic number, because the mean of its divisors is an integer number (82485360).

Almost surely, 2^494778621 is an apocalyptic number.

It is an amenable number.

494778621 is a deficient number, since it is larger than the sum of its proper divisors (165104259).

494778621 is a wasteful number, since it uses less digits than its factorization.

494778621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44515.

The product of its digits is 677376, while the sum is 48.

The square root of 494778621 is about 22243.6197818610. The cubic root of 494778621 is about 790.9280451829.

The spelling of 494778621 in words is "four hundred ninety-four million, seven hundred seventy-eight thousand, six hundred twenty-one".