491664119 has 2 divisors, whose sum is σ = 491664120. Its totient is φ = 491664118.

The previous prime is 491664109. The next prime is 491664143. The reversal of 491664119 is 911466194.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491664119 is a prime.

It is a super-2 number, since 2×491664119² = 483467211824092322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491664109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245832059 + 245832060.

It is an arithmetic number, because the mean of its divisors is an integer number (245832060).

Almost surely, 2^491664119 is an apocalyptic number.

491664119 is a deficient number, since it is larger than the sum of its proper divisors (1).

491664119 is an equidigital number, since it uses as much as digits as its factorization.

491664119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 491664119 is about 22173.5003777031. The cubic root of 491664119 is about 789.2649890646.

The spelling of 491664119 in words is "four hundred ninety-one million, six hundred sixty-four thousand, one hundred nineteen".