2785891 has 2 divisors, whose sum is σ = 2785892. Its totient is φ = 2785890.

The previous prime is 2785879. The next prime is 2785901. The reversal of 2785891 is 1985872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2785891 - 2⁵ = 2785859 is a prime.

It is a super-2 number, since 2×2785891² = 15522377327762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2785091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392945 + 1392946.

It is an arithmetic number, because the mean of its divisors is an integer number (1392946).

2^2785891 is an apocalyptic number.

2785891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2785891 is an equidigital number, since it uses as much as digits as its factorization.

2785891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 2785891 is about 1669.0988586660. The cubic root of 2785891 is about 140.7088369880.

The spelling of 2785891 in words is "two million, seven hundred eighty-five thousand, eight hundred ninety-one".