491659 has 4 divisors (see below), whose sum is σ = 561904. Its totient is φ = 421416.

The previous prime is 491653. The next prime is 491669. The reversal of 491659 is 956194.

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 491659 - 2³ = 491651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491651) 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, 35112 + ... + 35125.

It is an arithmetic number, because the mean of its divisors is an integer number (140476).

2⁴⁹¹⁶⁵⁹ is an apocalyptic number.

491659 is a deficient number, since it is larger than the sum of its proper divisors (70245).

491659 is an equidigital number, since it uses as much as digits as its factorization.

491659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70244.

The product of its digits is 9720, while the sum is 34.

The square root of 491659 is about 701.1839986765. The cubic root of 491659 is about 78.9262249890.

The spelling of 491659 in words is "four hundred ninety-one thousand, six hundred fifty-nine".