2799857 has 2 divisors, whose sum is σ = 2799858. Its totient is φ = 2799856.

The previous prime is 2799847. The next prime is 2799871. The reversal of 2799857 is 7589972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2719201 + 80656 = 1649^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 2799857 - 2⁶ = 2799793 is a prime.

It is not a weakly prime, because it can be changed into another prime (2799817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1399928 + 1399929.

It is an arithmetic number, because the mean of its divisors is an integer number (1399929).

2^2799857 is an apocalyptic number.

It is an amenable number.

2799857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2799857 is an equidigital number, since it uses as much as digits as its factorization.

2799857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 47.

The square root of 2799857 is about 1673.2773230998. The cubic root of 2799857 is about 140.9435751630.

The spelling of 2799857 in words is "two million, seven hundred ninety-nine thousand, eight hundred fifty-seven".