493389641889 has 9 divisors (see below), whose sum is σ = 712676970993. Its totient is φ = 328925023092.

The previous prime is 493389641867. The next prime is 493389641893. The reversal of 493389641889 is 988146983394.

The square root of 493389641889 is 702417.

It is a perfect power (a square), and thus also a powerful number.

493389641889 is a `hidden beast` number, since 4 + 9 + 3 + 389 + 64 + 188 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 493389641889 - 2⁷ = 493389641761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (493389641809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1990182 + ... + 2224320.

Almost surely, 2^493389641889 is an apocalyptic number.

493389641889 is the 702417-th square number.

493389641889 is the 351209-th centered octagonal number.

It is an amenable number.

493389641889 is a deficient number, since it is larger than the sum of its proper divisors (219287329104).

493389641889 is an frugal number, since it uses more digits than its factorization.

493389641889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468284 (or 234142 counting only the distinct ones).

The product of its digits is 322486272, while the sum is 72.

The spelling of 493389641889 in words is "four hundred ninety-three billion, three hundred eighty-nine million, six hundred forty-one thousand, eight hundred eighty-nine".