2905987 has 4 divisors (see below), whose sum is σ = 3321136. Its totient is φ = 2490840.

The previous prime is 2905961. The next prime is 2905999. The reversal of 2905987 is 7895092.

2905987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2905987 - 2¹¹ = 2903939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2905087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207564 + ... + 207577.

It is an arithmetic number, because the mean of its divisors is an integer number (830284).

2^2905987 is an apocalyptic number.

2905987 is a deficient number, since it is larger than the sum of its proper divisors (415149).

2905987 is an equidigital number, since it uses as much as digits as its factorization.

2905987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415148.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 2905987 is about 1704.6955739955. The cubic root of 2905987 is about 142.7023819755.

The spelling of 2905987 in words is "two million, nine hundred five thousand, nine hundred eighty-seven".