493139985 has 16 divisors (see below), whose sum is σ = 849718464. Its totient is φ = 242776512.

The previous prime is 493139957. The next prime is 493139989. The reversal of 493139985 is 589931394.

It is a happy number.

It is not a de Polignac number, because 493139985 - 2⁹ = 493139473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (493139989) 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 15 ways as a sum of consecutive naturals, for example, 1264267 + ... + 1264656.

It is an arithmetic number, because the mean of its divisors is an integer number (53107404).

Almost surely, 2^493139985 is an apocalyptic number.

It is an amenable number.

493139985 is a deficient number, since it is larger than the sum of its proper divisors (356578479).

493139985 is a wasteful number, since it uses less digits than its factorization.

493139985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2528944.

The product of its digits is 1049760, while the sum is 51.

The square root of 493139985 is about 22206.7553910966. The cubic root of 493139985 is about 790.0539326530.

The spelling of 493139985 in words is "four hundred ninety-three million, one hundred thirty-nine thousand, nine hundred eighty-five".