2705987 has 4 divisors (see below), whose sum is σ = 2740320. Its totient is φ = 2671656.

The previous prime is 2705981. The next prime is 2705993. The reversal of 2705987 is 7895072.

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

It is an interprime number because it is at equal distance from previous prime (2705981) and next prime (2705993).

It is a cyclic number.

It is not a de Polignac number, because 2705987 - 2⁴ = 2705971 is a prime.

It is an Ulam number.

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 2705987.

It is not an unprimeable number, because it can be changed into a prime (2705981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17048 + ... + 17205.

It is an arithmetic number, because the mean of its divisors is an integer number (685080).

2^2705987 is an apocalyptic number.

2705987 is a deficient number, since it is larger than the sum of its proper divisors (34333).

2705987 is an equidigital number, since it uses as much as digits as its factorization.

2705987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34332.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 2705987 is about 1644.9884498075. The cubic root of 2705987 is about 139.3505119626.

Adding to 2705987 its sum of digits (38), we get a square (2706025 = 1645²).

The spelling of 2705987 in words is "two million, seven hundred five thousand, nine hundred eighty-seven".