2663869 has 4 divisors (see below), whose sum is σ = 2868796. Its totient is φ = 2458944.

The previous prime is 2663867. The next prime is 2663887. The reversal of 2663869 is 9683662.

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 1071225 + 1592644 = 1035^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 2663869 - 2¹ = 2663867 is a prime.

It is a super-2 number, since 2×2663869² = 14192396098322, 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 (2663867) 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, 102444 + ... + 102469.

It is an arithmetic number, because the mean of its divisors is an integer number (717199).

2^2663869 is an apocalyptic number.

It is an amenable number.

2663869 is a deficient number, since it is larger than the sum of its proper divisors (204927).

2663869 is a wasteful number, since it uses less digits than its factorization.

2663869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204926.

The product of its digits is 93312, while the sum is 40.

The square root of 2663869 is about 1632.1363300901. The cubic root of 2663869 is about 138.6237430581.

The spelling of 2663869 in words is "two million, six hundred sixty-three thousand, eight hundred sixty-nine".