495566191 has 4 divisors (see below), whose sum is σ = 501536952. Its totient is φ = 489595432.

The previous prime is 495566171. The next prime is 495566209. The reversal of 495566191 is 191665594.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 495566191 - 2¹¹ = 495564143 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 (495566171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2985256 + ... + 2985421.

It is an arithmetic number, because the mean of its divisors is an integer number (125384238).

Almost surely, 2^495566191 is an apocalyptic number.

495566191 is a deficient number, since it is larger than the sum of its proper divisors (5970761).

495566191 is an equidigital number, since it uses as much as digits as its factorization.

495566191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5970760.

The product of its digits is 291600, while the sum is 46.

The square root of 495566191 is about 22261.3160212958. The cubic root of 495566191 is about 791.3474792201.

The spelling of 495566191 in words is "four hundred ninety-five million, five hundred sixty-six thousand, one hundred ninety-one".