2798723 has 4 divisors (see below), whose sum is σ = 2813568. Its totient is φ = 2783880.

The previous prime is 2798713. The next prime is 2798729. The reversal of 2798723 is 3278972.

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 2798723 - 2⁴ = 2798707 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2798729) 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, 7136 + ... + 7517.

It is an arithmetic number, because the mean of its divisors is an integer number (703392).

2^2798723 is an apocalyptic number.

2798723 is a deficient number, since it is larger than the sum of its proper divisors (14845).

2798723 is a wasteful number, since it uses less digits than its factorization.

2798723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14844.

The product of its digits is 42336, while the sum is 38.

The square root of 2798723 is about 1672.9384328181. The cubic root of 2798723 is about 140.9245442390.

Subtracting 2798723 from its reverse (3278972), we obtain a square (480249 = 693²).

The spelling of 2798723 in words is "two million, seven hundred ninety-eight thousand, seven hundred twenty-three".