495817081 has 4 divisors (see below), whose sum is σ = 496626532. Its totient is φ = 495007632.

The previous prime is 495817043. The next prime is 495817151. The reversal of 495817081 is 180718594.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59675625 + 436141456 = 7725^2 + 20884^2 .

It is a cyclic number.

It is not a de Polignac number, because 495817081 - 2⁹ = 495816569 is a prime.

It is a super-2 number, since 2×495817081² = 491669155622721122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495817781) 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, 403806 + ... + 405031.

It is an arithmetic number, because the mean of its divisors is an integer number (124156633).

Almost surely, 2^495817081 is an apocalyptic number.

It is an amenable number.

495817081 is a deficient number, since it is larger than the sum of its proper divisors (809451).

495817081 is an equidigital number, since it uses as much as digits as its factorization.

495817081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809450.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 495817081 is about 22266.9504198487. The cubic root of 495817081 is about 791.4810016953.

The spelling of 495817081 in words is "four hundred ninety-five million, eight hundred seventeen thousand, eighty-one".