491649277 has 8 divisors (see below), whose sum is σ = 562443392. Its totient is φ = 420994800.

The previous prime is 491649259. The next prime is 491649287. The reversal of 491649277 is 772946194.

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 491649277 - 2¹¹ = 491647229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491649277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491649217) 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, 27249 + ... + 41542.

It is an arithmetic number, because the mean of its divisors is an integer number (70305424).

Almost surely, 2^491649277 is an apocalyptic number.

It is an amenable number.

491649277 is a deficient number, since it is larger than the sum of its proper divisors (70794115).

491649277 is a wasteful number, since it uses less digits than its factorization.

491649277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69819.

The product of its digits is 762048, while the sum is 49.

The square root of 491649277 is about 22173.1656963998. The cubic root of 491649277 is about 789.2570470650.

The spelling of 491649277 in words is "four hundred ninety-one million, six hundred forty-nine thousand, two hundred seventy-seven".