2783969 has 4 divisors (see below), whose sum is σ = 2809620. Its totient is φ = 2758320.

The previous prime is 2783959. The next prime is 2783999. The reversal of 2783969 is 9693872.

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 1600225 + 1183744 = 1265^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 2783969 - 2¹² = 2779873 is a prime.

It is a super-2 number, since 2×2783969² = 15500966785922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2783909) 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, 12662 + ... + 12879.

It is an arithmetic number, because the mean of its divisors is an integer number (702405).

2^2783969 is an apocalyptic number.

It is an amenable number.

2783969 is a deficient number, since it is larger than the sum of its proper divisors (25651).

2783969 is a wasteful number, since it uses less digits than its factorization.

2783969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25650.

The product of its digits is 163296, while the sum is 44.

The square root of 2783969 is about 1668.5229995418. The cubic root of 2783969 is about 140.6764709692.

Subtracting 2783969 from its reverse (9693872), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2783969 in words is "two million, seven hundred eighty-three thousand, nine hundred sixty-nine".