2991487 has 8 divisors (see below), whose sum is σ = 3094416. Its totient is φ = 2889792.

The previous prime is 2991481. The next prime is 2991497. The reversal of 2991487 is 7841992.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2991487 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 (2991481) 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, 8448 + ... + 8794.

It is an arithmetic number, because the mean of its divisors is an integer number (386802).

2^2991487 is an apocalyptic number.

2991487 is a deficient number, since it is larger than the sum of its proper divisors (102929).

2991487 is a wasteful number, since it uses less digits than its factorization.

2991487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617.

The product of its digits is 36288, while the sum is 40.

The square root of 2991487 is about 1729.5915702847. The cubic root of 2991487 is about 144.0884070037.

The spelling of 2991487 in words is "two million, nine hundred ninety-one thousand, four hundred eighty-seven".