2987289 has 6 divisors (see below), whose sum is σ = 4314986. Its totient is φ = 1991520.

The previous prime is 2987287. The next prime is 2987297. The reversal of 2987289 is 9827892.

2987289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2975625 + 11664 = 1725^2 + 108^2 .

It is not a de Polignac number, because 2987289 - 2¹ = 2987287 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁸ + 9 + 8² + 7⁷ + 2¹⁶ + 8⁷ + 9³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2987287) 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 5 ways as a sum of consecutive naturals, for example, 165952 + ... + 165969.

2^2987289 is an apocalyptic number.

It is an amenable number.

2987289 is a deficient number, since it is larger than the sum of its proper divisors (1327697).

2987289 is a wasteful number, since it uses less digits than its factorization.

2987289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331927 (or 331924 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 2987289 is about 1728.3775629185. The cubic root of 2987289 is about 144.0209749539.

The spelling of 2987289 in words is "two million, nine hundred eighty-seven thousand, two hundred eighty-nine".