491396101 has 16 divisors (see below), whose sum is σ = 595347840. Its totient is φ = 395942400.

The previous prime is 491396099. The next prime is 491396119. The reversal of 491396101 is 101693194.

It is a happy number.

It is not a de Polignac number, because 491396101 - 2¹ = 491396099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491396161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123105 + ... + 127033.

It is an arithmetic number, because the mean of its divisors is an integer number (37209240).

Almost surely, 2^491396101 is an apocalyptic number.

It is an amenable number.

491396101 is a deficient number, since it is larger than the sum of its proper divisors (103951739).

491396101 is a wasteful number, since it uses less digits than its factorization.

491396101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 491396101 is about 22167.4558982306. The cubic root of 491396101 is about 789.1215471868.

The spelling of 491396101 in words is "four hundred ninety-one million, three hundred ninety-six thousand, one hundred one".