2987869 has 4 divisors (see below), whose sum is σ = 3163644. Its totient is φ = 2812096.

The previous prime is 2987863. The next prime is 2987911. The reversal of 2987869 is 9687892.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2762244 + 225625 = 1662^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2987869 - 2¹⁵ = 2955101 is a prime.

It is a super-2 number, since 2×2987869² = 17854722322322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2987863) 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, 87862 + ... + 87895.

It is an arithmetic number, because the mean of its divisors is an integer number (790911).

2^2987869 is an apocalyptic number.

It is an amenable number.

2987869 is a deficient number, since it is larger than the sum of its proper divisors (175775).

2987869 is a wasteful number, since it uses less digits than its factorization.

2987869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175774.

The product of its digits is 435456, while the sum is 49.

The square root of 2987869 is about 1728.5453421880. The cubic root of 2987869 is about 144.0302951949.

The spelling of 2987869 in words is "two million, nine hundred eighty-seven thousand, eight hundred sixty-nine".