493995913 has 4 divisors (see below), whose sum is σ = 494056708. Its totient is φ = 493935120.

The previous prime is 493995907. The next prime is 493995923. The reversal of 493995913 is 319599394.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319599394 = 2 ⋅159799697.

It can be written as a sum of positive squares in 2 ways, for example, as 158080329 + 335915584 = 12573^2 + 18328^2 .

It is a cyclic number.

It is not a de Polignac number, because 493995913 - 2²¹ = 491898761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (493995923) 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, 15906 + ... + 35227.

It is an arithmetic number, because the mean of its divisors is an integer number (123514177).

Almost surely, 2^493995913 is an apocalyptic number.

It is an amenable number.

493995913 is a deficient number, since it is larger than the sum of its proper divisors (60795).

493995913 is an equidigital number, since it uses as much as digits as its factorization.

493995913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60794.

The product of its digits is 1180980, while the sum is 52.

The square root of 493995913 is about 22226.0188292910. The cubic root of 493995913 is about 790.5107592762.

The spelling of 493995913 in words is "four hundred ninety-three million, nine hundred ninety-five thousand, nine hundred thirteen".