491775093 has 6 divisors (see below), whose sum is σ = 710341814. Its totient is φ = 327850056.

The previous prime is 491775091. The next prime is 491775131. The reversal of 491775093 is 390577194.

491775093 is a `hidden beast` number, since 491 + 7 + 75 + 0 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 462809169 + 28965924 = 21513^2 + 5382^2 .

It is not a de Polignac number, because 491775093 - 2¹ = 491775091 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 (491775091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27320830 + ... + 27320847.

Almost surely, 2^491775093 is an apocalyptic number.

It is an amenable number.

491775093 is a deficient number, since it is larger than the sum of its proper divisors (218566721).

491775093 is a wasteful number, since it uses less digits than its factorization.

491775093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54641683 (or 54641680 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 491775093 is about 22176.0026379869. The cubic root of 491775093 is about 789.3243665275.

The spelling of 491775093 in words is "four hundred ninety-one million, seven hundred seventy-five thousand, ninety-three".