2263639 has 4 divisors (see below), whose sum is σ = 2587024. Its totient is φ = 1940256.

The previous prime is 2263633. The next prime is 2263643. The reversal of 2263639 is 9363622.

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 2263639 - 2¹¹ = 2261591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2263639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2263633) 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, 161682 + ... + 161695.

It is an arithmetic number, because the mean of its divisors is an integer number (646756).

2^2263639 is an apocalyptic number.

2263639 is a deficient number, since it is larger than the sum of its proper divisors (323385).

2263639 is an equidigital number, since it uses as much as digits as its factorization.

2263639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323384.

The product of its digits is 11664, while the sum is 31.

The square root of 2263639 is about 1504.5394644209. The cubic root of 2263639 is about 131.3013090399.

The spelling of 2263639 in words is "two million, two hundred sixty-three thousand, six hundred thirty-nine".