493009491 has 16 divisors (see below), whose sum is σ = 724376576. Its totient is φ = 296333856.

The previous prime is 493009463. The next prime is 493009499. The reversal of 493009491 is 194900394.

It is not a de Polignac number, because 493009491 - 2⁶ = 493009427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (493009499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145315 + ... + 148668.

It is an arithmetic number, because the mean of its divisors is an integer number (45273536).

Almost surely, 2^493009491 is an apocalyptic number.

493009491 is a deficient number, since it is larger than the sum of its proper divisors (231367085).

493009491 is a wasteful number, since it uses less digits than its factorization.

493009491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294042.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 493009491 is about 22203.8170367169. The cubic root of 493009491 is about 789.9842388566.

The spelling of 493009491 in words is "four hundred ninety-three million, nine thousand, four hundred ninety-one".