2128783 has 2 divisors, whose sum is σ = 2128784. Its totient is φ = 2128782.

The previous prime is 2128781. The next prime is 2128799. The reversal of 2128783 is 3878212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2128783 - 2¹ = 2128781 is a prime.

It is a super-2 number, since 2×2128783² = 9063434122178, which contains 22 as substring.

Together with 2128781, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064391 + 1064392.

It is an arithmetic number, because the mean of its divisors is an integer number (1064392).

2^2128783 is an apocalyptic number.

2128783 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128783 is an equidigital number, since it uses as much as digits as its factorization.

2128783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 2128783 is about 1459.0349550302. The cubic root of 2128783 is about 128.6403257427.

The spelling of 2128783 in words is "two million, one hundred twenty-eight thousand, seven hundred eighty-three".