491981102 has 16 divisors (see below), whose sum is σ = 743051232. Its totient is φ = 244302240.

The previous prime is 491981057. The next prime is 491981153. The reversal of 491981102 is 201189194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401663 + ... + 402885.

It is an arithmetic number, because the mean of its divisors is an integer number (46440702).

Almost surely, 2^491981102 is an apocalyptic number.

491981102 is a deficient number, since it is larger than the sum of its proper divisors (251070130).

491981102 is a wasteful number, since it uses less digits than its factorization.

491981102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 491981102 is about 22180.6470149092. The cubic root of 491981102 is about 789.4345694943.

The spelling of 491981102 in words is "four hundred ninety-one million, nine hundred eighty-one thousand, one hundred two".