2798623 has 2 divisors, whose sum is σ = 2798624. Its totient is φ = 2798622.

The previous prime is 2798611. The next prime is 2798639. The reversal of 2798623 is 3268972.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2798623 is a prime.

It is a super-2 number, since 2×2798623² = 15664581392258, which contains 22 as substring.

2798623 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2798603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1399311 + 1399312.

It is an arithmetic number, because the mean of its divisors is an integer number (1399312).

2^2798623 is an apocalyptic number.

2798623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2798623 is an equidigital number, since it uses as much as digits as its factorization.

2798623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 2798623 is about 1672.9085450197. The cubic root of 2798623 is about 140.9228657804.

The spelling of 2798623 in words is "two million, seven hundred ninety-eight thousand, six hundred twenty-three".