1491382687 has 8 divisors (see below), whose sum is σ = 1495482912. Its totient is φ = 1487289600.

The previous prime is 1491382679. The next prime is 1491382703. The reversal of 1491382687 is 7862831941.

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 1491382687 - 2³ = 1491382679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1491382687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491382187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 986262 + ... + 987772.

It is an arithmetic number, because the mean of its divisors is an integer number (186935364).

Almost surely, 2^1491382687 is an apocalyptic number.

1491382687 is a deficient number, since it is larger than the sum of its proper divisors (4100225).

1491382687 is a wasteful number, since it uses less digits than its factorization.

1491382687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3569.

The product of its digits is 580608, while the sum is 49.

The square root of 1491382687 is about 38618.4241910516. The cubic root of 1491382687 is about 1142.5179511565.

The spelling of 1491382687 in words is "one billion, four hundred ninety-one million, three hundred eighty-two thousand, six hundred eighty-seven".