491687103 has 8 divisors (see below), whose sum is σ = 663481728. Its totient is φ = 323841944.

The previous prime is 491687101. The next prime is 491687137. The reversal of 491687103 is 301786194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491687103 - 2¹ = 491687101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491687101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 987075 + ... + 987572.

It is an arithmetic number, because the mean of its divisors is an integer number (82935216).

Almost surely, 2^491687103 is an apocalyptic number.

491687103 is a deficient number, since it is larger than the sum of its proper divisors (171794625).

491687103 is a wasteful number, since it uses less digits than its factorization.

491687103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974733.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 491687103 is about 22174.0186479582. The cubic root of 491687103 is about 789.2772875581.

The spelling of 491687103 in words is "four hundred ninety-one million, six hundred eighty-seven thousand, one hundred three".