495501491 has 4 divisors (see below), whose sum is σ = 495850152. Its totient is φ = 495152832.

The previous prime is 495501473. The next prime is 495501563. The reversal of 495501491 is 194105594.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495501491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495501691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172190 + ... + 175043.

It is an arithmetic number, because the mean of its divisors is an integer number (123962538).

Almost surely, 2^495501491 is an apocalyptic number.

495501491 is a deficient number, since it is larger than the sum of its proper divisors (348661).

495501491 is a wasteful number, since it uses less digits than its factorization.

495501491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348660.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 495501491 is about 22259.8627803497. The cubic root of 495501491 is about 791.3130388761.

The spelling of 495501491 in words is "four hundred ninety-five million, five hundred one thousand, four hundred ninety-one".