491212118 has 4 divisors (see below), whose sum is σ = 736818180. Its totient is φ = 245606058.

The previous prime is 491212079. The next prime is 491212123. The reversal of 491212118 is 811212194.

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

It is a super-3 number, since 3×491212118³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122803028 + ... + 122803031.

It is an arithmetic number, because the mean of its divisors is an integer number (184204545).

Almost surely, 2^491212118 is an apocalyptic number.

491212118 is a deficient number, since it is larger than the sum of its proper divisors (245606062).

491212118 is a wasteful number, since it uses less digits than its factorization.

491212118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245606061.

The product of its digits is 1152, while the sum is 29.

The square root of 491212118 is about 22163.3056649950. The cubic root of 491212118 is about 789.0230502223.

The spelling of 491212118 in words is "four hundred ninety-one million, two hundred twelve thousand, one hundred eighteen".