493857909 has 12 divisors (see below), whose sum is σ = 744365856. Its totient is φ = 314923752.

The previous prime is 493857901. The next prime is 493857929. The reversal of 493857909 is 909758394.

493857909 is a `hidden beast` number, since 493 + 85 + 79 + 0 + 9 = 666.

It is not a de Polignac number, because 493857909 - 2³ = 493857901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493857901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1192687 + ... + 1193100.

It is an arithmetic number, because the mean of its divisors is an integer number (62030488).

Almost surely, 2^493857909 is an apocalyptic number.

It is an amenable number.

493857909 is a deficient number, since it is larger than the sum of its proper divisors (250507947).

493857909 is a wasteful number, since it uses less digits than its factorization.

493857909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385816 (or 2385813 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 493857909 is about 22222.9140528419. The cubic root of 493857909 is about 790.4371393640.

The spelling of 493857909 in words is "four hundred ninety-three million, eight hundred fifty-seven thousand, nine hundred nine".