2857663 has 2 divisors, whose sum is σ = 2857664. Its totient is φ = 2857662.

The previous prime is 2857661. The next prime is 2857693. The reversal of 2857663 is 3667582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2857663 - 2¹ = 2857661 is a prime.

Together with 2857661, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2⁵ + 8⁵ + 5⁹ + 7⁷ + 6⁴ + 6⁶ + 3⁵ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2857661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428831 + 1428832.

It is an arithmetic number, because the mean of its divisors is an integer number (1428832).

2^2857663 is an apocalyptic number.

2857663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857663 is an equidigital number, since it uses as much as digits as its factorization.

2857663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 2857663 is about 1690.4623627872. The cubic root of 2857663 is about 141.9069515389.

The spelling of 2857663 in words is "two million, eight hundred fifty-seven thousand, six hundred sixty-three".