493136661 has 4 divisors (see below), whose sum is σ = 657515552. Its totient is φ = 328757772.

The previous prime is 493136653. The next prime is 493136669. The reversal of 493136661 is 166631394.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (493136653) and next prime (493136669).

It is not a de Polignac number, because 493136661 - 2³ = 493136653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493136669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82189441 + ... + 82189446.

It is an arithmetic number, because the mean of its divisors is an integer number (164378888).

Almost surely, 2^493136661 is an apocalyptic number.

It is an amenable number.

493136661 is a deficient number, since it is larger than the sum of its proper divisors (164378891).

493136661 is a wasteful number, since it uses less digits than its factorization.

493136661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164378890.

The product of its digits is 69984, while the sum is 39.

The square root of 493136661 is about 22206.6805488799. The cubic root of 493136661 is about 790.0521575348.

The spelling of 493136661 in words is "four hundred ninety-three million, one hundred thirty-six thousand, six hundred sixty-one".