2591687 has 4 divisors (see below), whose sum is σ = 2961936. Its totient is φ = 2221440.

The previous prime is 2591683. The next prime is 2591711. The reversal of 2591687 is 7861952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2591687 - 2² = 2591683 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 2591687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185114 + ... + 185127.

It is an arithmetic number, because the mean of its divisors is an integer number (740484).

2^2591687 is an apocalyptic number.

2591687 is a deficient number, since it is larger than the sum of its proper divisors (370249).

2591687 is an equidigital number, since it uses as much as digits as its factorization.

2591687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370248.

The product of its digits is 30240, while the sum is 38.

The square root of 2591687 is about 1609.8717340211. The cubic root of 2591687 is about 137.3601796314.

The spelling of 2591687 in words is "two million, five hundred ninety-one thousand, six hundred eighty-seven".