495017891 has 8 divisors (see below), whose sum is σ = 523618080. Its totient is φ = 467007552.

The previous prime is 495017881. The next prime is 495017899. The reversal of 495017891 is 198710594.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495017891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495017899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145736 + ... + 149093.

It is an arithmetic number, because the mean of its divisors is an integer number (65452260).

Almost surely, 2^495017891 is an apocalyptic number.

495017891 is a deficient number, since it is larger than the sum of its proper divisors (28600189).

495017891 is a wasteful number, since it uses less digits than its factorization.

495017891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294925.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 495017891 is about 22248.9975279786. The cubic root of 495017891 is about 791.0555196046.

The spelling of 495017891 in words is "four hundred ninety-five million, seventeen thousand, eight hundred ninety-one".